Can't seem to find a pair of inexpensive CVD axles

[Hairy W Bush]

I had bought (4) NOS cvd axle shafts a while back for my Savage. Very nice pieces. Problem is, 2 are left hand thread and the special nuts I have are right hand thread and I can't get them in left hand unless I make them (which I was actually in the process of doing). The closest I can find are these https://rc4me.us/product/hpisav8018/ but they're saying I need to upgrade my diff cups? yea the ones I bought are 9mm diameter ball ends so I'm not doing that.
halp

 

[KnowAir]

I had bought (4) NOS cvd axle shafts a while back for my Savage. Very nice pieces. Problem is, 2 are left hand thread and the special nuts I have are right hand thread and I can't get them in left hand unless I make them (which I was actually in the process of doing). The closest I can find are these https://rc4me.us/product/hpisav8018/ but they're saying I need to upgrade my diff cups? yea the ones I bought are 9mm diameter ball ends so I'm not doing that.
halp

What are the diameter of the axles/nuts?

 

[Hairy W Bush]

the threads? m4x.8