A lovely thought but the CAA seem to have decided that Permits are for aircraft that are not eligible for a C of A. The decision is relatively recent so I can't see them doing an about face without good reason.
At some time in the past they allowed orphans (where the Type Certificate was dormant) to go on to Permits but not any more.
What would be good is if PFA Engineering became approved for C of A renewals on certain SEP types. There are a number of types that are available either as factory built or kits. Approval would allow PFA to administer both types (and for instance the factory built Jodels as well as the plans-built ones).
Mike