Your best bet is to join us spunky funsters in
Adland -- free to join, very small subscription fee if you want to watch the videos -- and ask your question there. There's a forum specifically for "searching for an advert".
The bad news is that, thanks to website rebuilding, joining Adland is currently by invitation only.
The good news is that I can invite you! Let me know your e-mail address (safest by private message), and I'll have an invitation sent to you.