Does anyone know where, other than a Benz parts counter, I can purchase one of those screens used to separate the cargo area of a wagon from the rear seat? Is installation a no-brainer?

Went out to the coast for a four-day weekend (got mired in Sears Point NASCAR traffic on the way home). Along the way we discovered that my Golden Retriever much prefers sitting in the back seat of the TE next to my girlfriend's 2-year old to lying in the cargo area next to my babies (golf clubs...). I guess my dog was spoiled by having a special seat (old blankets) and seat belt in the 300E and the E34.

Thanks.

__________________
David

His:
2003 Dodge Durango SLT
2002 BMW E39 530i Sport
1988 Mercedes 300TE
Hers:
2003 Chevrolet Suburban
1999 E430