Question on disks and lug pattern

[CG]

I have the five lug conversion disk and dropped spindle set up for my panel. One wheel Im considering doesnt come in the five x five pattern, but does come in the smaller car pattern. Can I just purchase the five lug disks from a car? If so which ones? Would my calipers still work with the car disks? I'm guessing for the rear I could just have my axles re drilled and use the car drums and brake set up...thanks for any help.