st3ph3n, My driver side rocker gasket went a couple of days before my last remap. I phoned Nobles and the guy delivered the gasket first think in the morning for me. He forgot to send the two "D" shaped hard plastic plug thingys though (bad description, I know) . They have a slight lip on them where they fit between plate which are prone to cracking. I managed to use my old ones and bonded them up.
I think they cost around £7-£10...Canny remember to be honest but it was an easy job.
Thanks to nobles for helping me keep my mapping session !