Ok, I just called in to change my order to 3 of the 700 mAmp drivers, and added 6 more LEDS to bring the total to 36.
I guess I'll just do 3 rows of 12 evenly spaced instead of clumps of LEDs.
Good idea Hoppy. I'm tapping into SFBAAPS to see if anyone knows of a local source for heatsinks or aluminum channels . I'd rather not get it shipped since shipping would probably be pretty high.