This guy does bead blasting, he's out in Templeogue, not sure if he does powder coating too but I think he does, not too expensive either and it's worth getting the frame blasted if you want a nice finish, hope that helps ;)
Hi there, in the event that you decide a large plug is the correct size for you I would sell mine for a fair chunk cless than the rrp (think they are £450 now). Get in touch if you are interested.