The 65 XE has 2 keyboard types that I am aware of:
- Spring type - single sided mylar
- Rubber Dome type - double sided/folded mylar
The spring type keyboard mylar replacements are available here: https://retrolemon.co.uk/atari-8bit-upg ... brane.html
The rubber dome type mylar replacements are available here: https://thebrewingacademy.com/products/ ... 8973736036
I was unable to find any UK sellers for the rubber dome type mylar, however my order from The Brewing Academy did only take about 2.5-3 weeks to arrive from the US, so it's not a long wait by any means.
Before you order either type, you should disassemble the keyboard and remove your old mylar to confirm the type you have, because these items are not cheap and ordering the wrong one can be an expensive mistake.
On disassembly, the type you have will be immediately obvious, as you will either see springs or rubber domes!!
Hope somebody finds this helpful.