decided to search some more ... found this guy in japan, selling
the camper and the Magnum p.i. models
http://homepage3.nifty.com/Fleetwood/vw%2002-04.html

this guy in france has the UN model ...
http://www.beetle-shop.fr/290.htm

and this guy also has the UN model ... $29cdn/$20.30us
http://www.udisco.com/hobbies/inv/REVE09.HTM
note that he lists the model number as 7380U (have to scroll down
the page a ways to find it).
he also lists a T2 (68-79) camper ... never seen one of those in
large scale before.
on page 10, he says he has the 7633 camper kit, too .. $10.99us.

this guy claims to have the Vanagon ELW/firetruck ... $30!
http://www.friendshobby.com/html/Sales/PageC2d.htm

this guy has the campers for $12.00
http://www.smhracing.com/revellmono.htm

another source of campers, but in japan (kinda high priced, too)
http://www.jtw.zaq.ne.jp/wakamo/okaiage/ca-track.htm

another camper ... $19.00 per kit
http://www.depotland.com/inventory/aut-inv.htm

have fun. :)

unca joel