Looking for BMC Race Engine Parts

Hi all, I am looking for BMC race engine parts, specifically, XSP parts to 
complete the restoration of my cooper formula junior. The XSP engine is 
designed for a light race car chassis and was a real dog in the road cars due 
to a lack of low end grunt. 
The blocks say XSP on them and there is a special cam with an extra gear, oil 
pump etc. Any leads appreciated!

Regards, Dave Rettew
281-565-5260
retters@aol.com