Check out the auto parts stores like Advance. They carry all kinds of mats for you to choose from.
Or you just check out places like Lowes or Home Depot, in the carpet section.
Ours has the rear seat removed, and for $15.00 I found a rubber backed mat that is a near exact fit for the whole rear tub. Ours has liner material done to it, but the mat makes quick work of dumping the Florida sand out that the dogs drag in.
Front mats are deep mud mats from Advance. Keeps the debris in the mat and doesn't let it roll off into the jeep. Wet or dry. Just pull the mats and shake em off and toss em back in.
97 Sahara, 74 Renegade, 72 CJ5, 55 Willy's (the Beast) Boss 302, 6:34 gearing, Bose 901 speakers.
God I miss that Jeep. Forgot the kinda Jeep, 80 SX4.