Heres my experience with door seals......
I got a left hand cab door seal from justkampers....it was cheap. It was covered in white dusty chalk, made from really crappy sponge-like rubber, was too big and had to be cut to "fit". It was missing some of the pre-formed right angle corners and the profile of the rubber was generally very roughly cut out. In short, it was total rubbish.
Today I received a right hand cab door seal and sliding door seal, this time from VW Heritage. The difference is very obvious. No dusty chalk, the rubber is very good quality, actually feels like rubber rather than sponge! It has all of the pre-formed corners, joins were neatly made and the profile is cleanly cut with no "dangly bits" hanging off. In short, they are excellent.
VW Heritage will get my custom again. Plus, VERY speedy delivery to Ireland.