Hendo,
If you try this gent who goes by the name of "Roy", he's rather knowledgeable in that side of things.
http://forums.nitroexpress.com/showflat....true#Post320758

Send him a PM & see what he can do for you; fingers crossed!

There are a few others about that are real .303 nuts, "Sarge" from NZ is also rather good as well.

Oh, by the way welcome to the NE forum!
93x64mm