I've heard that Delta wont supply to non-commercial people also but in this months RIB International, the couple who are featured and live in Scotland (i believe) have a 7m Delta which, from the photos looks pretty newish to me; so who knows?
I guess if the boat was bought under a business name rather than an individuals, it makes it a commercial sale right?
So, you could own a florists and still have a RIB from them as a commercial customer. If they questioned it, you could say that it was for shipping flowers back and forth to an island or something (commercial business????)
Theres ways and means around everything