BR,
Your situation sounds like an article I read about a fellow souping up his 1911. After while he had a box of parts that when he put them together they looked remarkably like his original.
When I finally get a desk top receiver to look at, I will not have that problem, no spare parts!
I saw your request for a wrench and was going to offer mine but Rcat's will work just as well. Mine would also need a big wrench to drive it, so that part is the same.