..... This is the only manufacturer that I have found in 3 years looking
for a high roof, besides adventurwagen that does not produces them
anymore....
Not quite true.  The molds for the Adventurewagen have been acquired by
members of the Adventruewagen list and, last I heard, a batch of tops were
being produced.  They were looking for a minimum of seven orders, don't know
if that number has been reached yet.  This has been an active topic on the
AW list.  Contact  Veronica.Fraga@phs.com