Wanted: Frame sub assembly-rear suspension

[Blacky]

I'm in need of the frame sub assembly that all the rear suspension parts bolt to.
It's part#20152. It must be in very good condition with surface rust only. It's for my '97.
There was a clunking sound in the left rear and when I removed the wheel I could see that the trailing arm had ripped free from the badly rusted subframe.
My other two 1992s are not nearly as rusted and one of them is from Montreal where salt is dumped by the ton on a daily basis all winter.
If I can't find a good one for a decent price, I may have to remove the one from my 92 that is now a parts car. It will be a beast of a job with all the bolts so rusted into place.