Missing Mindstorms CD-ROM

Hi,

I've recently acquired a Lego Mindstorms Robotics Invention System
v1.5, but unfortunately it came without the CD. I've not had much luck
with 'official channels' (Lego etc) so I was wondering if anyone from
here could point me in the right direction or perhaps be able to supply
me with a replacement (or some form of download).

I've read about the third party solutions (NQC, Brickos etc) but I
would like the original software as well to get me started.

Thanks very much!

James