Vintage Synth Repair

I recently purchased a P600 from eBay. It has two faulty filter chips 
(and crappy keyboard contacts and a blown fuse ;). As I understand 
these are CEM3372 ICs, right?

My question is plain and simple: where can I get two replacement 
chips? Wine Country Sequential does sell them, but since I live in 
Finland I'm willing to consider other (Cheaper?) suppliers.

Any help appreciated!

Regards,

Matti Ikonen