Prostar Wheels

I don't think so. Weld was the first with that style, and there are now several makers of copies. You might be able to order a custom wheel from Weld, but I wouldn't bet on it. None of the copycats will. IF Weld would do a custom, it won't be inexpensive !
The only true lightweight race wheel that I know of drilled for 5 on 4, would be centerline autodrags.
There is a thread here for showing off sbp wheels. Maybe you could find something you like there.