Around 3 years ago I sold on a BassChat regular in the FS forums, an early 70s sunburst Precision that had been modded to have a Jazz width ebony fretless board, with added J pickup (so, a PJ fretless, cutting to the chase!) Think it was previously owned by BassBod, Beedster, Shaggy and possibly others.
Did my first ever fretless recording on it and it was like a comfy pair of old slippers, in retrospect the nicest fretless I have ever owned.
Sold it to a BCer who I have since nagged ceaselessly to sell back to me .... and he unsurprisingly won't (I wouldn't either)!