sunroof coupes are rare, approximately 100 65-69s listing in the Registry these days
to tag on to John's comment, Nadellas are rare also, found on 904 and 906 racecars, as well as 911s and 912s 65-66. If you don't stay original and swap them out for CVs, they might bring $$ to fund your project
912 Registry -* Nadella Halfshafts in '65-'66 Porsche (TM) 912