I take it you are having the 12" rear wheels made? This would explain the higher price. I only ask because the Boze and most of the ZE wheels, unless you go with 19" 3 pc ZE's, don't come in a 12" width wheel.
Have you looked at
CCW? Their one piece forged wheels are VERY nice and come in sizes that will work well for you at a price that will put a smile on your face!! They can't do a way deep dish on the back...but they can get a good staggered look for ya. Take a look at
Jake's wheel and car
BTW, I loved the way my Intro Pentia's looked on my camaro...but they are gone now.