Vintage Synth Repair

I'm wondering if anyone here has attempted to fix a Clavinet pickup? 
My upper died, and appears to be fixable, IF I can get to the wires 
inside the epoxy (or whatever they sealed the pickup with.) I would 
love to simply replace it, but $220 is not in the cards right now. 
Besides, I hate throwing something out just because it's busted. 
Especially when I can SEE the broken wire inside the epoxy!

Thanks,

Jim Blair
http://www.facebook.com/ApeIslandSound