Yes, Dexron 2 was used by VAG in its gearboxes of that era.
I've always managed to find Dex 2 in Halfords when I needed it so I can't say whether you could use Dex 3 and so on, but it wouldn't surprise me if you could use the newer fluids. I believe the COMMA website can give you a better idea....
http://www.commaoil.com/