If I read that right, he wants to put non-C-Clip axles in his C-Clip axle.
No go kimosabe, there is nothing to retain the axle.
The early axles had larger bearing holders which had 1 pc bearings which were attached to the axle with a colar and retained by the backing plate.
The C-Clip axles have C-Clips at the differential.
If I read it wrong, and he wants to actually put C-Clip axles into an older housing...
I doubt that would work. One would have to look it over real good, but I suspect that when they changed bearing types, they changed the bearing surface design. Besides, you have that C-Clip thing to cut off

The newer bearings won't work in the older housings and you would have to use the old style ones.
I don't see how you believe more parts or options are available for a C-Clip instead of a Non-C. The carrier, gears and all axle bearings (except for the tube bearings) are all available.
5-90 - I have looked, I could not find a C-clip eliminator for either the D35,
or the Corporate 8.25.
Ron