While you never want to hear that jobs will be lost due to a store closing, it's always worthwhile to check them out as many times the fixtures become available for sale.
Forum member Anton67 gave me the heads up on Sears local to us that is closing, and liquidating everything in the store.(Thanks, Mark!)
I was able to score these heavy duty mannequins for $10. Grabbed 3, but plan on heading back to grab one or two more. Got some looks from people in the store, but totally worth it!

They're a little larger framed, so not the best for uniforms of the smaller, but greatest generation. They do work well for outer jackets, though. Hoping to find smaller framed examples at my next visit.
Even scored a mannequin small enough to display my child's USMC uniform (cut down from a father's uniform for his son).
Thanks for looking!