I’ve seen an inordinate amount of hard-to-find replacement parts on eBay recently.
A customer contacted us looking for the spreader for the percolator basket. In the past I’ve seen complete baskets and stem sets on a couple of occasions but that’s about it. This week there were two or three of that particular part available. In fact, on seller was selling all the parts of a percolator.
3 1/2 quart kettle handle
These come up from time to time and there is now.
Original glass percolator knobs
Pressure cooker handles
4 qt pressure cooker over pressure plug
Unless you steal one from another working pressure cooker, these are unobtanium. But there is one (appears used) for sale on eBay.
The point is, if you keep looking, you can probably eventually find what you need for your Revere Ware on eBay.