I've been searching for it for a while - not even the mighty Musicroom has it. What it does have, though, is this:
http://www.musicroom.com/se/ID_No/017732/details.html
Except I'm not sure if one of the pianos is the original score.
Please help!

Yes that's the one. The orchestral part will have been reduced to 2nd piano, you just read 1st piano.

I purchased that copy from muiscroom and it should be at my house right now!! I will post later telling if it is good or not!

Okey dokey. Thanks very much for your help!