Great! You assumed rightas it happens I may, I bought some sometime back. I'd need to check if I'm right.
Please give me a kick, nudge if I've not responded for a while, I easily get sidetracked and forget.
Assuming part 6
Yes, probably try that also if can’t find the part.When I had missing dust seals in an xt headset I got a piece of plastic sheet, drilled a hole into it then cut around that hole using a scroll saw so there was a 2mm thick plastic ring. Then I sanded down the inside edge