Yeah; for now, we can still buy surplus parts off of the Government. Plus they are made in the USA and the Civi parts are, for the most part, the same so we can get aftermarket on a lot of things.
They look fab. Always wanted one, but rare and expensive here. Have looked at the US auctions, but seems that most ex-mil vehicles can only be sold to a USA civilian. So no chance of me getting one for export.
I would never put a Dodge motor in anything I own.... I may upgrade it to the 6.5 turbo eventually, but I want to keep it in military spec condition. Honestly for a 5000 lb vehicle the 6.2 does okay.
Check out the "milweb" site n go to classified adverts. There is one listed at present, a GS spec version. That's the site for some seriously off road military vehicles. Fancy a Pinceguaer? The Army 's successor to the 101.