If you download the toolbar most of the suppliers are listed on there Kieran. Hexis well that comes from hexis lol, APA do a range of their own vinyl, Robert Horne sell Oracal, William Smith sell 3m, Arlon & Isee2 they may also sell other brands but can’t say for sure.
Guessing you have used MDP supplies as they sell KPMF which you say you have used. Not a big fan of the stuff you actually used because I think it’s a bit flat looking & most people seem to prefer a more textured carbon but I suppose you get what you pay for & that’s at the cheaper end of the films. They do also do a cast carbon film which has a more textured finish but it’s a lot more expensive.