I suspect he's looking for a PDQ kit, most or many of which were designed by Matt Kania.  Kania then went to Sterling (which your friend may have mistaken for Sullivan) and designed many similar models.

Thanks for jogging my memory!  A PDQ 1/2-A Mustang was what I would call my "first successful build and fly many times" model.  Maybe someone here has a kit ...

Dennis

PS: The "Clown" series - Brodak supplies a few - also originated with PDQ.  The Sullivan PDQ 6 (photo added) was originally a published plan, not sure if it was related to Kania or PDQ Company in any way.  25" wingspan, O&R .23, built by Bill Darkow.  Good Luck!

Speaking of PDQ Mustang, isn't someone here building (built) one recently? I seem to remember a thread on one. It was here, RCG or CEF. Or was it a PDQ Zero?

I don't think it was CEF, but I frequent here, and those two places pretty regularly (and mix them up just as regularly).