rear axle shock tabs/brackets 4x4 - where to buy?

[j_cst_10]

I have a 70 K5 blazer that has a mystery axle in the rear. It is a 12 bolt, 6 lug axle with spring perches but no shock mounting brackets.

Someone may have added perches to a 2wd bracket at some point? Not sure. Gear ratio's match front to back so it's getting used.

The front axle had a legible BOM number, it's a 1980 K20 dana 44 with a 6 lug pattern. Maybe the rear is also out of this truck, though I would think the shock brackets would be on this.

Are they any factory style brackets I can buy to weld onto the axle tube?

Tried searching but I just come up with the 2wd brackets that attach to the U bolts.