How can I bring this conversation up again?

So i was having a conversation with a friend and he asked if i had gotten a girlfriend yet. I told him no so he brought up that he and his girlfriend had hung out with this girl we both knew. He told me that she ask him about me and how i was doing since she knows me and him work together. When he told her i look completely different she wanted to see a picture of me.
I didn't know what to even say so i didn't say anything. But now i want to know how to ask him if she's single or how i can get into contact with her since he said she has no social media of any kind. I haven't seen or talked to this girl in like 12 years.

How can I bring this conversation up again?
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