If you have discs on the front (like mine) the studs from the front are longer than the rears. You can buy new front studs and they will press straight into the rear hubs and the job is done.
You have to remove the little 10mm nut that secures the drum on as well. The drum is kept in place when the wheel is on anyway.
The front is a little more involved.
I used some studs on the front that were not VW, at the base, they are slightly wider than the 14mm VW stud and I had to remove the hub and get the holes drilled out to fit. Only a very minor amount but my engineer mate was not going to allow me to press the stud into an undersized hole. It would eventually explode with dire consequences.
Someone I heard of recently has used Toyota Land Cruiser studs, which may be a direct swap which might be worth investigating.
This pic is the before and after. I used a different set of hubs, just in case it all ended in tears, I could go back to stock and still be able to drive!
This is the front wheel with the stockie 14mm VW stud. Not enough meat there
This is the after pic of my front wheel fitted, plenty of stud protruding makes you feel a lot safer when you are hammering it around the bends.
The finished product. i manged to get some centre caps and ground them down to fit. The "chrome" caps on the rear studs are off the Holden Monaro 19mm and they push on. They don't fit over the front nuts as they are 21mm. I will have to keep searching to find something to fit there. I am in the process at the moment of getting custom made nuts to fit but I'm yet to get a price for them. This pic isn't very clear in the wheel view. I am out on a cruise tomorrow so i will take a more detailed pic or two then.