I've always thought the Oka is a great concept as a vehicle with worldwide available mechanical components and even some body parts.Our 24 year old OKA was built in Australia.
Simple mild steel rigid ladder frame chassis, superb bush performance from very long leaf springs. All glass is flat all body panels easily remade. Any part you can't buy you can make.
The Perkins was from the UK, but is often replaced with a Cummins 6BT and 5 speed Allison.
The diffs are Dana 60 front and 70 rear, sometimes replaced with 80s. Can be maintained forever.
1.9m overall width (our body is 2.16m x 6m overall including spare wheels). Small enough to go anywhere, big enough to provide some comfort and carry some fuel and water.
Would seem to be ideal for you guys in the States where these parts are cheap and still being made new.