Installing some new spring perches but need the nuts and bolts

Are these shafts and roller bearings expensive to have made? Just curious i guess. I have a set of arms here that i'm about to do the ball joint angle mod and am curious if the shafts are custom pieces or something you buy from a racing suspension parts store. Thanks again John, keep up the killer work!
 
The shafts are custom made and cost $100ea with bearings and hardware. I tried to find a shaft from a stock car or performance store but they didn't have anything I could use. The arms take about 2-3 more hours of work on top of the work we do to the track ready arms we have now. It's a lot of work and a lot of material cost. The cost of the basic frame is not much compared to the cost of the rest of the material. And thanks, I have a few more trick vintage leagal products in mind. I still enjoy it.

John