Cv joints.

So.ordered a set of jr 454 cv joints for rear of southern gt outer ones on the stub shafts.tonight measured up.the gear box side and have 100mm the 108mm I bought dont fit.
Is there a 100mm cv joint with the same 25 spline configuration I can use.
My box was rebuilt by Chris cole and the adapters came from him.does anyone know if he is still working.

And can you buy the 108mm gearbox adapters.saves messing about.
Thanks shaun