Driveshaft parts

[goblin]

Hi, I’m new to VWs and am currently swapping a 1.5D motor from a rusty 1978 Mk1 to a less rusty one. The gearbox seems to be leaking from the left side driveshaft flange, and when I started trying to pull the shaft out the little oil seal cap on the inside of the flange disintegrated. None of my usual suppliers seem to have the part and it seems that there’s more than one size - any recommendations on where to source one fairly quickly, preferably from Australia? I’m also going to need CV boots and possibly a CV joint, and haven’t yet found anyone locally with those either.
Cheers