Pistols that have all their individual "parts" availiable to buy?

One of the traits I really love about "Glock" is how almost all of their gun parts are proliferated to the point that they can be purchased from a number of stores.

Other than the obvious 1911, What are some some other Makes & Models that have a vast number of "factory gun parts" available to be purchased?

I appreciate any help or info yall can give me!

Based on what I think I know;

Pistols with the most individual factory "Gun Parts" available to be purchased from a store with 1 being the most and so on;

1. 1911 (all models)
2. Glock (all models)
3. Beretta 92FS
4. ?
5. ?
6. ?
7. ?
8. ?
9. ?
10.?