Doepfer

I've got an A-112 Sampler with a battery that's starting to corrode (fortunately not on the 
PCB). Anyone know a good U.S. source of a replacement? 

(It's an Emmerich Z3A 65 rechargable - the Doepfer site also says a 3GP-60 is a replacement 
and that it's the same battery as in the d3c, MCV24, Schaltwerk and Regelwerk)

Thanks!