Korg Poly800/EX800 Users

Hi,

I've got an old Poly 800 Mk 1 from which I bought about 10 years 
ago.  A long time ago I managed to connect it up to an Amiga via midi 
which totally wiped out all the sounds.  Eventually with the advent 
of the internet I managed to get some sound banks downloaded and 
transferred them to minidisc in order to attempt to reload the sounds.

Now, impatient as I am, I didn't bother to go and get a new correct 
power supply, just thought I'd use what I had around the house.  I 
managed to find a 9V PSU from another keyboard.  Didn't realise it 
was giving out 1A current though.  A black cloud of smoke issued from 
my Poly 800.

I realise it's probably beyond repair, and I've been in touch with 
another guy who has done the same thing and he reckons I'd need a new 
board which you can no longer get hold of...

Anyway, my question, and it's a long shot:  Does anyone know of a way 
I can salvage this?  I'd even just like to use it as a midi 
controller, bypassing the sound generation part of it.  Has anyone 
out there got this sort of detailed knowledge to lend me a hand?

Thanks in advance for any advice, no matter how small :)

Rich