Do you have broken keys on your keyboard? It's starting to get difficult to find replacement keyswitches at a reasonable price.
So, instead of lurking on eBay, and replacing the whole switch, just replace the broken plastic post. Available as singles for a quick repair, or sets of 12 if your keyboard is in really bad shape.
This is a replacement adapter for the "ALPS Short Stem" keyboard switch for the Apple II or II+
This is the 12-degree adapter, Apple part #815-0182