https://www.thesamba.com/vw/forum/viewtopic.php?p=6944878&highlight=#6944878 Found my original post and there is a link to an ebay seller, but it's no longer active. May be worth posting on the above link.
Thanks, have done. Worst case, I will find someone to do a CAD drawing as per the measurements I posted and see if I can get one 3D printed.
Good to know. Any tips on how to get the glass out, or do you actually need to in order to change the seals?
I didn't take the glass out, I slid the glass over the seal and then back and forth edging the felt seal further underneath the sliding bit each time, if that description makes sense!
Perfect. Thank you. That's quite a relief - also moves the job up the list as it seems more doable. How many metres do you reckon it takes per window? I've got two to do.