Thanks again for the help, guys!
@OldDan: That's good advice and something I will keep in mind if we're in direct contact with the prop shop next time. (Our yard sent them off for us and handled the details.) Hopefully, we won't do anything to the props that necessitates sending them back anytime in the near future, though!
@av8r: Tacoma Propeller was super helpful and were able to confirm that the smaller set of props were the original. So, we'll be putting those back on for the extra maneuverability and so we don't overstress the engines as we head up the Mississippi.