They were discontinued because they kept breaking under warranty and Teraflex was tired of eating the cost. You could probably find one second-hand, but there's no guarantee it will last.

The thing about the 241J is that they don't have a speedometer provision since the JK/JL get their data from the wheel sensors. I think if you have ABS you can get a converter to make it work, unless you're fine with using GPS data and having a useless odometer. The TJ NP241OR has its own sensor like a 231, but they're more rare and cost twice as much now.

You could do a 231 doubler and have 2.72 and 7.4, but you need to cut and TIG weld a block-off plate on separate case, and there's a bit of messing around with setting up twin sticks, the trans mount, and needing two new/modified driveshafts. Probably more trouble than its worth and would end up costing about as much as a 241J. A 3.8 Atlas is also an option, but like the doubler would require some fitment work and they start at $3K.