I wanted a plate from our old camper (no, the REALLY REALLY old '71 camper, not the rusty '76 which we stil have) but... the donor vehicle has to exist which it didn't really (we choppped it up and only kept the engine and doors!)... I'm not sure if it has to be MOTd?
Anyway, you could always offer them £100 for the pink jag, or do a swap for your Fester. Then the plate comes with it and you get a nice pink Jag to drive around into the bargain.
Oooh suit you sir