I found this in the local (The Netherlands) free-ad paper:

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Camper Kit for new model Transporter T4 LWB highroof, includes:
closets, bed, kitchenblock, pillows foil etc. price: the
equivalent of US$700
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I don't have anything to do with them/it/this but if you're interested
i can call and find out what you'd like to now. shipping possible.

Brian.