I was in your same situation not long ago. I too was watching for a Kimberly. They do not come up for sale often enough. During this time I spotted a few other "offroad" campers and decided to broaden my search. Things all clicked and we now have a
Evolution E1
We have comfortably slept four adults and one older child in it.
I just about have it fixed up where I want it.
They have now been discontinued, but there are quite a few fairly new and new models still out there. They are priced very reasonably compared to other options.
Several other manufacturers have "offroad" models too. I think Starcraft has the Baja model.
None of them are "rock crawlers", but they will crawl over rocks. Forest service roads are cake. The package is large so two tracks get really tight. Ours is a base camp so went things get too tight we'll park it.
These might be a direction worth looking. Thought I'd shine a light this direction for you.