Brian, thanks for the reply.
I just need drawings of a real Spit IX to get some inspiration for detailing (mods) of the Hacker kit. The kit is of a very good quality, however it needs some realistic touches. (see September 2001 Model World product review)

I found a poster that would do the trick http://www.spitfirerestoration.com/pages/posters.html
but I was hoping to find something like that for free on the net...

If you know of any other sources, please let me know

cheers ,Vasek