72 c-20 rear drum problem

[Bigcatfixer]

Hello all. My name is Gordon, and I recently picked up my first 67-72 chevy truck (all of my others had been 73 up models) and I'm in the process of fixing the brakes on this old girl. The problem I'm having is that nobody seems to have the self adjuster repair kits for a 12 x 2 1/2" rear drum anymore. The last monkey that owned this truck apparantly decicded that it didn't need the self adjusting arm on the right side (the left was intact...thank god). I've looked just about everywhere, and none of the kits that fit the other brake sizes available have anything that is remotely close. Does anybody have any ideas before I start scrounging wrecking yards? Any help is greatly appreciated.

1972 c-20.
Leaf Springs w/Dana 60 axle