Options for rear leaf spring replacement

[chevy72blu]

My truck is a frankenbuild '72 C20, cut down to a short bed.

The 2 piece shaft was converted to a one piece. It looks like in order to accomplish this, someone torched out the lower section of the carrier bearing crossmember. My guess is there was a pinion angle issue at the time and the single piece shaft would have hit the section that was cut out.

This looks fine the when observed while sitting, however it seems that axle wrap from the leaf spring rear is lifting the driveshaft upwards, rubbing the upper edge of the carrier bearing opening. This is cutting a line into the driveshaft, as clean as if it was turned on a lathe. Its around 1/32" now. This is all from stop light to stop light driving... no hard hook ups or burnouts.

The rear suspension has had the overloads and 1, perhaps 2 leafs removed. My guess is this what caused the issue.

What options are out there for replacement leafs or another setup? The truck has 2" lowering springs in front and about 3-4" drop in the rear (from the leaf removal). I've always wanted to convert it to trailing arms but the cut up crossmember (and cost of aftermarket) has made me shy of it. I dont haul anything with it FWIW.