I don't know the direct link to the Air Decker reskin sadly but I'm pretty sure it is contained within this OmsiWorld download: omsiworld.com/?feature=downloadsystem&fileid=bristolairport&req=info
Man I wouldn't want to be on your bus! I mean it isn't as bad as trentbarton in my local area though. You pay twice the fare of NCT to be aggressively be rolled about in rock solid seats. That's why I take the tram!