Reply to APC40 Encoder Repair

Anyone got a lead on where these can be bought (at a reasonable price) a few of mine are starting to go ghostly on me .. already cleaned out with Compressed Air and Contact cleaner so guess they are past their sell-by date.

One guy on Ebay sells them for 6 bucks a pop (+$39 shipping) ..

I would have thought that they are "just encoders" sending A/B signals.. but Akai are using non-standard encoders with 4 pins rather than 3 (maybe just to be awkward ?)

Now if one of those Pins are "just for show" It would be great and I could just order a bunch of standard encoders for a buck a piece and be done with them all rather than be selective and choose the worst ones to replace (although there about 5 or 6 that are dodgy)

Anyone gone the route of repairing them ?

These are the ones from an APC btw

http://www.ebay.com/itm/Akai-APC-40-...item5d432b46a0