I looked into doing this when I had a Bay window Westy.
To fit up front is not bad, you need to space the bearings 10mm further apart (at a 5mm spacer behind the inner and outer bearings) and then the hub will fit onto your T2 spindle. They use the same bearings.
Then you need to make up a pair of caliper adaptors and off you go!... well its never quite that easy
At the back, its a lot more difficult. There is nothing in common with Porsche stuff. I was going to look at drilling the hub for Porsche studs, slipping the Porsche disk over the top and then make up a plate which bolts to the rear arm and accepts the Porsche backing plate... but I never got that far so don't know if any of that will work.
Good luck.
MG