Korg Poly800/EX800 Users

I've figured out the Poly Mk1 hardware and am going to use a bigger 
eprom in my Poly 800 to stash the Mk2 firmware. Does anyone have this 
(or the sysex expansion ROM) on disk? There's a lot on the files 
section (Mk1, EX800) except this ROM...

Thanks.

Gerrit