Reply to Fader knob question

Hey all,

Been lurking here for a little while, and decided I want to try my hand at a DIY controller (I'll start a build thread once I start the process, still need to acquire some of the components). Which brings me to my question:

Where can I find just the knobs/caps for faders? I'd like to have 3 faders in my project: 2 pitch and a crossfader. I picked up the slide pots on allelectronics (the only knob they had that was close to what I wanted was this one and it doesn't mount correctly on the slider). I've also checked Mouser and scoured the almighty Google, but the only ones I could find were replacement parts for Pioneer/Vestax/Rane/etc... that cost more than I'd like to spend.

Any help is greatly appreciated