If you want only a couple of switches, you could try mouser, digikey, wasdkeyboards. The price per switch gets lower if you buy more.
I bought some blue switches myself from mouser.
Mouser and Digikey only have blacks, clears, and blues.
And wasdkeyboards have every kind of switches. All of the switches are for plate mounted, but since you only need springs, it wouldn't matter.
You could make Realforce like(having different weights for pinky keys) keyboard with Cherries.