What you are looking for is a "Sunrader" 4x4, of which only about 30 were built in 1984-1987.
There are several groups that deal only with Toyota Motorhomes, on being firstname.lastname@example.org
and the other toyotamotorhomes.com.
As the few available units are much sought after, expect to pay in the range of $15-25k for anything decent. And BTW: The 4x4 has a much bigger problem with the rear axle
recall issue than the 2wd versions. I suggest that you study up a lot so you don't get a pig-in-a-poke.