Suggestion

Based on the example on the Bluebird K7 example, let me change the inflection of this thread slightly. Why not offer HLF funding for already extinct aircraft types, that may have a particular historical significance, or being a good example of the manufacturing process involved. A wellington is a good example of a uniquely applied technology (although it is obviously not extinct). The Hornet as the pioneering use of aluminium to wood Redux (Araldite) technology, The Whitley for its very unique airframe frame/hoop/section construction.

Where there might be substantial remains of of a type left (but not a complete one) restoring these sections together actually destroys much of the original. These original parts are exhibits in themselves, if they are unique survivors of a particular type. In this case, why not support a professional reproduction of the whole, and retain the origional partial remains alongside?? This is surely a national museum task to preserve the history over $$ value concerns.