Actually, I decided to go with the first plan, and see how that goes.
This girl doesn't answer my texts at the moment, so I don't expect any success, she's probably wrapped up in some other guy.
When this other girl approaches her at her workplace (a bar), I imagine the target girl will be shocked.
I'm gonna have the girl on my side say it to her say it like this:
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Ask for target girl at the bar.
Just give me 10 minutes. -Beg for her time.
It's about my ex-bf. I hired a private detective to track him down, and I've been approachhing every girl he has recently had contact with in hopes of getting a message to him. The 11 girls I've talked to so far all no longer have contact with him, they text him, they call him, they email him, and he never answers or responds.
I know you have been in recent communication with him.
Please be honest with me, are you in contact with him? Is he your boyfriend?

I won't get mad if he's your boyfriend, I don't care if he has a girlfriend, just please just be honest with me.
What's his name?
She says my name.
He's not my boyfriend.
Are you telling the truth, he is not your boyfriend? No.
How do you know him then? Blah blah
Do you have contact with him? When is the last time you saw him, spoke with him? Called him? Had text communication with him?
OMG, he actually texts you!
He's such an amazing man, I've never met a guy like him. He's so masculine. I know he got very depressed recently, his pet died, he started drinking a lot, and his personality changed to being very weird, and he broke up with me.
It was only for a year, but our relationship was so amazing, the time I spent with him was the best time in my life. I got mad at him when he was sad, I was selfish and didn't understand his feelings, it was totally my fault, I felt so terrible, I've bounced to different boyfriends but it just wasn't the same.
I need to get a message to him. I need your help! I want him back! Can you help me please!
I don't know. No. I have nothing to do with it. I don't want to get involved.
But he messages you! Please! Look, please just tell him (name of girl working for me) loves him, tell him I just want to see him again to explain my true feelings. Tell him I understand that he went through, a bad time, and I want to cheer him up!
I'll pay you! I will kill myself if you don't.
He's not like other men, he's really a very special kind of person. The time I spent with him, it was so. He would make such a good father.
I can't imagine life without him. Our relationship wasn't perfect, I was okay if he wanted to see other girls. He did want to see only me at one time, he was ready to give up all other girls, but I was so mean to him. I feel so terrible about it now. He's been hurt by many girls. I understand him now! He's not the kind of guy that is desperate for sex at all, he had sex with me more for my pleasure than for his. It was amazing. He just wants real love and he doesn't know how to find it, I never gave that too him, I was too shy. I want to change it, I want to give that to him now. I want to tell him my real feelings. He's so emotional, his feelings get hurt so easily now, he needs to be handled very delicately, but he's really such a strong man, and a genius! He's like a celebrity you know. I want to marry him! I want him to raise my kids.
Please tell him my feelings! Tell him I found you. Tell him I hired a detective, tell him my message.
Beg beg beg!
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This model girl is pretty persuasive, I bet she can stir something.
I'm still thinking how I should handle it when I get a text about this from the target girl.
If any thinks of anything I should be adding to make this a more interesting or effective situation, then please let me know. Thanks.