
It looks like the stock was very cheaply manufactured, with a lot of extra room that shouldn't be there for the receiver and trigger assembly. At some point, someone cranked down the screws on the trigger assembly enough to break it. I don't expect anyone to know of a replacement part for something this old (although it would certainly be nice...) but am open to any suggestions as to how to easily repair it better that I already have.
The trigger assembly is broken between the two rear screw holes. Currently, it is stuck together with super glue gel.

The front mounting screw hole for the trigger assy is also broken so that the head of the screw passes through freely:

I have rebuilt the interior of the stock using an epoxy putty. I put a layer of saran wrap between the receiver and the stock and put it in place. I pushed blobs of epoxy putty up into the vacant spaces from the bottom, then put more plastic wrap over it and pushed the trigger assembly into place to what looked like the proper position. I smeared the screws with grease to keep the epoxy from sticking, and loosely screwed them in. After setting the opening looks like this:

the rifle is currently fuctional, but the trigger is held in place by only the single remaining good screw.
Ideas?
thx,
-Chris