you can either get them as a service shell for your rusty one or they are offering a service with gbs sportscars in collaboration they are registering them correctly as GBS do with kit cars so don't bat an eye when you see a brand new reg mk2 escort however most will fit a private plate and yes everyones aware you wont get tax and test exemption from a new registered shell
this is for the mk2 however motorsport tools offer a svo department so they will be in talks about new registering mk1s too