Korg Mono/Poly

I have a beloved vintage Mono-Poly that has been my analog keyboard of 
choice for live performance for many years.  I need three replacement 
keys, specifically E, F, and F#, thanks to a clumsy roadie.  Any help 
would be most appreciated.  I have 4 Moogs (Mini, Micro, Multi, and 
Poly), but I prefer the Mono-Poly to all of them for live performance. 
The wonderful arpeggiator gets a lot of use.  The Mono-Poly is perfect 
for reproducing vintage VCS-3 Pink Floyd sounds (especially the synth 
solo on "Run Like Hell"), and I prefer the pitch and modulation wheels 
to the Moog touchstrips.  I don't have a lot of patches set in stone; 
I use the "change the cutoff and resonance on the fly" technique more 
often than not.  Again, any help you can offer concerning the keys 
would be most appreciated.

Thanks, Joe