I don't think there were too many of these repros made.
Civil War reenactors have to buy rifle muskets that reflect the arms carried by the unit they portray. If their unit didn't have the Colt variation of the 1861 Springfield, they would be historically out of place with the rest of their company/regiment. Hence the demand was not what Colt had anticipated.
BTW, I had both a Armisport 1861 and a Colt. I gave the Armisport one away to a friend and still have the Colt.
Vigilantibus et non dormientibus jura subveniunt. Molon Labe!