Cool air do them - I replaced mine a couple of years back. I put a little kink in mine with pliers to make them grip a bit harder as they did get a bit loose https://www.coolairvw.co.uk
Ha ha well I have 3 spares of the empi ones but they are in storage in a parts box in England with my van - I am in the USA at the moment so will be a long wait if you want a free one
There's definitely two sizes, this is the shallower one compared to deeper one in the bottom left image
They changed the design a few years later so the caps screw on I suppose that doesn't help you tho' really... does it?
Ive got one straggler that came off when the new owner of my van bounced off the kerb driving away........the VWbadge is self adhesive, so can be removed. Happy to send you this in the post if you give a donation to MIND?