Yeah, good luck, I had a similar problem. It looks to me like there’s some restrictions on market share preventing EU sellers shipping to the UK, but then the UK distributor isn’t keeping up with spares. I can’t find a replacement lockout / damper for my Reba at the moment.
I got a decent set of O-Rings from Q:Bikes via ebay. But like you I ended up with the wrong wiper seals – they’re different between boost and non-boost forks. However the right ones were sent out after a quick phone call. Glide rings weren’t included, but mine seemed in good shape.
TFTuned had the bits in stock to do the service, but didn’t have service kits to sell.