There are numerous books out there on buffets and Garde Manager. Your best bet is to check out shops that are geared more towards professionals than home cooks. J.P. Prince usually has some good (very expensive) books on the subject. I am not sure if they have an internet sight or not, but check it out. There are also some catering magazines out there (not sure of the names). They can give you some ideas also. Sorry I can't be more specific.