OK, now (I think...) I have everything: a steel GV diff cover, an exploded RHS CV (more than one actually), a complete LHS axle, and a complete RHS axle just to measure how long it should be.
The aim is to cut the LHS triangular flange and the RHS CV, weld them together, and bolt a LHS axle on the right side. I won't try longer diff brackets for now, as I believe they will not work with the normal A-arms...
But it looks like the flange is going to hit the lower bolt of the diff bracket... Should I weld the right diff bracket on the diff instead of bolting it? Any other suggestions?
And it seems that I have pics of the completed setup on my PC, but I can't remember where I found them or who posted them