I have my old u-bolt plates for sale. I have no use for these since the bolts are on top of the axle now. They are in used condition with some after market surface rust..
They are normally used on LT SUA applications and fit any standard 2.5" wide leaf spring like Deavers etc.
I got them from Kartek but they look exactly like these.
$40 shipped to lower 48 states.