I picked up a Torsen swap off ebay and he sent me the half shaft axles missing the inboard what im calling the "axle cap". It holds in all the grease on the joint closest to the Diff. Do you think these can swap off my 1.6 open diff axles or maybe i can buy them somewhere? What is the correct part name for these?

 

Quick update for future searches...

The 1.6L and 1.8L NA axle caps are the same size.