Unless he absolutely needs a '61 and not a '63, for reenactment purposes , that '63 is more or less the same rifle , as a repro. Different hammer and flash channel? Repro is Repro , in my opinion, as long as it's a Pedersoli it will be a good shooter.
Anyone with access to GunBroker can access that auction, its not like it's hidden away in a gun shop somewhere and I gave the location away.
I guarantee 90% of us search GunBroker at least weekly for used repro muskets and have already seen this auction.