Knobs for 6mm solid shaft

[JD0x0]

Anyone know of good knob sources for 6mm solid shaft pots. Right now I have plastic knobs with a set screw, looking for some heavy metal ones, preferably. I tried buying a few from other sources, and the they didn't fit the shaft. They're Alpha pots.

 

[Verne Bunsen]

I buy 6mm set-screw Tele style knobs from Stew-Mac. Plated brass, good and heavy.

http://www.stewmac.com/Hardware_and_Parts/Knobs/Flat-top_Knob.html
http://www.stewmac.com/Hardware_and_Parts/Knobs/Dome_Knob.html