Vintage Synth Repair

Hi all,Anyone out there have fader shafts and the square knobs for a 
ARP 2600.Some of mine are broken off,I can still use the faders,but it 
would be nice to get it back to original condition.All I have found are 
the shafts,(a little tiny piece of plastic),for $25 each on Ebay.No 
way...