How about using an airbag jack like this one:(http://www.4x4winches.com/airbagjack.htm)? Put it between the upper bunk and roof when deflated, then pump it up with exhaust (some models can use a portable air compressor).

You could even build your own: (http://pinzi.us/html/air-jack.html) if you are so inclined.

Good luck,

TJ Hannink
Goldibox - 1987 Vanagon Camper, Wolfsburg Edition
1981 Bluebird Wanderlodge, FC-33
Winter Park, Florida
http://home.earthlink.net/~tjhannink/
http://groups.yahoo.com/group/wolfsburg_campers
http://groups.yahoo.com/group/FC_wanderlodge
FAVOR website:  http://home.earthlink.net/~clubvanagon

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