Just posted in the "which leaf springs?" about using my stk 38 springs. Done a little research on some parts and found this site. Stengel Bros Inc, www.stengelbros.net. I had to register, once I did that I found all sizes of U bolts, bushings, spring bolts and you name it. Just figured it may help someone else. Looks like you can get bushings in about any size, brass, rubber, and they have the U bolts in U shape or square. Nice thing is that you can get shorter ones where you don't have to thread them down farther and cut them off.