Hi Cole you did not cause a fuss and its a legitimate question.
Yes you need to purchase a single conversion JR Rceiver crystal channel #24 and it may or may not be avalible at you LHS as carrellh noted but if not you can at his link.
Just one last warning though. Before you order a Rx crystal pull that #24 crystal out of the transmitter first and confirm that it is actually a Channel #24. Flyers often in the past switched crystals.
John