Doepfer

>>...crack the metal can, cut/lever away the plastic/goo and remains of the filter, until all that's left are the metal connectors, 
>>then simply resolder the mains wires to these terminals.


Id just like to add weight to Sean's comments, as thats how ive fixed a couple of old G6s.

It was some time ago, and i cant remember the exact details, but i remember it being messy rather than that intellectually 
difficult.

As the time, i think i sourced the originals, but i wasnt keen on paying the (now) extended price for them!