Any licensed ATF+4 on the list that nyogtha linked to is the same and will work fine.
Chrysler's ATF+4 licensing process is so silly and childish going WAY beyond the level they need to. It's not just a spec. Not only does Chrysler dictate the formula, but they also stipulate the suppliers of the ingredients. Therefore, all licensed ATF+4 is the same, whether you get it Walmart or the dealer.
The best ATF for transmissions that require ATF+4 isn't licensed at all! It would be Redline C+. Better than anything Chrysler will license, using a group V ester base oil, but Chrysler is jealous and won't license it because it doesn't use the required group III base stock from one of the approved vendors.