This is a bit of an old thread but still worth adding more information to it.
The Chrysler MS-10838 spec fluid for the Commander was originally sold under Mopar part number 05142893AA. This part number has long been superseeded.
However, the current product code for Mopar is now 68234631GB which specifically states Chrysler MS-10838 spec on the label.
Just so happens that I am in luck - the Jeep dealer in Ballarat (Wendouree) happens to have stock of it! The only downside is that it costs $83 per quart!
Happy to pay that - don't want to have issues relating to power steering pump nor the hydraulic coupling on the radiator fan which relies on the correct spec fluid.