What key? If ignition it will be a vehicle key. The rest will probably be generic keys depending on what locker they fit. If you have both halves of the key, a good cutter should be able to do you a new one.
Unless there is someone on here who knows, I would contact a locksmith. Maybe an expert in that field would be able to identify it and supply a replacement from the number alone.
A day of all things motorhome and campervan. The show is held both in the main indoor arena and across the grounds. Catering, hot drinks and food options are available. Easy access to the site and free parking included. Win one of five pairs of day tickets