Well - If you ask me - the nicest tribute would be FP Neck with LNG body. And original neck profile would be from late 80's please.
About pricing this very very rare DY777/FP77 model - I would't go any cheaper with price than what people ask from original FP and DY models nowdays.
No way you'll get more by parting it out. The neck is the only thing with any substantial value. You'll get $500-$600 for the neck if it's PERFECT. The body and hardware wont get you any more than $500.