Indeed I was well aware of prefab kick panels. Surprisingly, there are a lot of options in that realm...I researched the heck out of all I could find, and in the end I just decided to just cut up my own instead.
But since this thread is intended primarily as a brainstorm/research session for others, I'll share all the custom kick panels I found available on the market:
The Ricks setup comes with some unknown speaker of unknown quality/brand, it says 6.5", but in the pic it's oval so I don't know what obscure size it really is. Plus it's designed for Non-A/C cars only, and mine is an AC car: http://www.rickscamaros.com/camaro-radio...-1967-1968.html
Ames sells some custom kick panels with speakers already installed...they don't offer pics, but I'm pretty sure they're Custom Autosound's offering, which I'm pretty sure is the same as what Ricks sells: https://secure.amesperf.com/qilan/Search_Web;jsessionid=D0E7091B9911FCA554F7D99B382C8320 http://www.casmfg.com/Camaro_Kicks.htm
Also, for more $$ than I spent on my entire system, these very nice looking units are available to accept 6 1/2" rounds plus a separate tweeter...again for non-A/C cars only: http://screaminperformance.com/camaro_kick_panels.htm
Since 100% of these would require me to purchase, and then immediately cut them up and mod anyway for my A/C situation, I just decided I had nothing to lose by cutting up my own...and with 6x9's I was able to cram in bigger speakers than any of above...plus it was entirely free, except for my time.