This is the best image I could find of them:

Part 12 on this diagram here from Lings if it helps to make things clearer:

Part number on Lings: PFKL1012391 / 91527-SZ3-003
Obviously yes they're available brand new but I'm not paying £2.15 each. Does anyone perhaps have any/willing to remove some from a car they're breaking? 4G ones are different (not sure if they'll still fit though), established with the help of Gayno & h10ndr.
Going to be swapping my trims over with some mint ones I got from @mills, hopefully he can clarify whether they're a total PITA to remove or not. Just want some spares in case I break some removing my old trims.
@bennyboy I remember you got a box of random clips some time ago (I think it was you), can you recall if anything like that was in there?