If you are after service kits, contact these guys – http://stores.ebay.co.uk/plushsuspension/
The owner of Plush used to work at the RS distributor, used to teach Cytec and is a good friend of mine.
What you have to remember about o-rings for ANY company is that they test their seals/orings against the oils that they use. Using ‘brand x’ oils and ‘brand y’ seals may be cheap, but if they havent been tested, the “base” of the orings (that being the chemical structure of the o-ring) may react with the oil. If you dont know what i’m on about, take an o-ring from a brake that uses DOT 4 fluid, then put it in a pot/jar with some 5wt suspension oil and come back 24 hours later – the o-ring expands, degrades and breaks down. The net result will be (in your case) a leaking air seal, loss of travel, loss of control and potentially a broken face!
As they said to me when I was in school (with reference to drugs) “Don’t do it kids. “
Contact Plush.