Like I said not worth it to me, but legitimately rare/expensive. Duplicating it would not be the same - a repro is just a repro. ... and a repro 61 cover on a 64 bass is actually worth less than that same 64 with the proper/original cover. Colectors are a pedantic sort like that.
Nickel was to 65-66 (not a hard cut over) actually, but yeah., close enough.