i am have been searching for ages to find a substitute/replacement for the clips that attach to the body of the bus so the deluxe trim can be fitted, several of the clips where rusted and fell apart when we took them off, any help urgent as bus is basically complete other than this finishing touch

Not really answering your question, but on Andy I filled the holes in the body work, removed the clips from the trim and re-attached the it with "body mould tape" It's been on securely for ~ 3 years and there's no holes to rust or let water in.
Just an option for you.
Richard

Try "The Bus Co."
http://www.thebusco.com 
Ken Madson is the bloke in charge. He is in Seattle and I think he charges about 3 usd for each of them.

if your desperate i might have a dozen or so floating around somewhere, will have to have a look tho, cant really remember what hapenned to them.