Stock up on any new old tock MKIV parts, VW/Audi cuts everything at about 10 years, and then it is oem like manufacturers or used.
I have to get some new old stock pieces for my B5 1.8TQ, and they are going to hurt my butt bad with the expense. I need side trim for the rocker panels, fron valence, rubber seals and other stupid stuff that is outrageous -- yet totally not in demand save for a few like us.
H are the latest and final revision. D are a second revision and the original parts apparently were just 06B-133-555