Almost every revolver can get fixed. Until the frame cracks or stretches beyond repair. Then, that frame is trashed. The parts sold.
Many guns are sold at Police Auctions, with the stipulation, they cannot be re sold. So, all the parts are removed, sold for a profit and, the frames cut up.
The frame is, literally “The Gun”. Legally and repair wise.
Your odds of finding a revolver frame…are slim. People don’t swap out frames like they do with Semi autos.
When the first Para Ordnance frames came out, people bought them and converted their 1911’s. Then sold the stripped frames. I picked up one of those and put my Ace .22 conversion unit on it. But, there are no aftermarket revolver frames I’m aware of.
As a sidebar, assembling a revolver, from parts, is going to be much more difficult than you might think.
Assuming you want it to actually work.