CV Joints

[Fast BMW 7]

Does anybody know the appropriate part number for the CV joints on the GKN axleshafts? I believe there will be two different types due to the fact that the axle shafts have different diameter splined ends. I have the smaller-splined joints (stamped on the circumference of the joint: GKN part # C153120151012 188/00). It is the larger-splined joints that I require.
I am replacing some very badly modified Ford axles with some GTR shafts that are missing the one set of CV joints. Any help would be greatly appreciated! Cheers!

[BigMack]

On our Ultimas the outer CV is 100mm(ford/bmw/VW/etc.) and the inside CV is the larger 108mm commonly found on Porsche's. Not sure of the part numbers though.
Cheers!
-Mack