Sourcing IBM Model M 104 Key?

Hey all. Was wondering if anybody knew a good reliable site to get a IBM Model M 104 Key Keyboard, however, I just want some buckling springs. I found this one: and think it would suit my needs, but I'm not sure how reliable this site is (I've heard of issues with keyboards not being in stock and because of a lack of a stock tracker online, you just don't know until it doesn't show up) 
Can any body help me out here? Thanks all. 

that is the official site of unicomp, i've noticed looking at their stuff they they must have stocking issues, but i'm pretty sure it usually says if something isn't in stock