Don't hold your breath waiting for a cheap P7 clone, even with patent expiration. The market is not so large as for somebody else to be in a rush to tool up. Which would be expensive. There are a lot of stamped parts in a P7 which are cheap to make... after you have the presses and dies paid for. And still a good deal of machining to do, which can be done rapidly... on multimillion dollar CNC centers.
Sell off some junk and get a nice pistol.