CokkeliI have VC rebuild topic http://www.vwsyncro.co.uk/data/forums/topic.asp?TOPIC_ID=3309. With pictures. I just contacted to shop that makes O rings and X rings. Guy there said that it might be possible to get new ones for a decent price. It seems that x-rings are standard size but material is unknown to me, i think its polyurethane.
I have had a little something else in my mind than VC rebuild, but i think ill complete it in next 2 months maybe….
Houseywith rebuild i mean new a better fluid aswell 
Cokkeliyes, i have wacker ak100.000 fluid ready for this. Do you mean better with higher viscosity fluid? im waiting for new xrings now, seller promised me one for Test. and offered ones to be made from polyurethane.
Richard JamesI have it all finished and seems to be working properly I would suggest a higher viscosity silicone. Ebay uk has a company that sells the silicone and most of the seals for our cars as the kit is for the t4 syncro. The proper weight I believe is 340.000? He has it and that is what is suggested according to a technical bulletin posted on vortex somewhere.