Found cup holders at United RV in Fort Worth TX (www.unitedrv.com).  I'm not sure they are listed on their site but you can order from them online.

I bought some for $5.95 each which is a bit more than some of the recent postings but the good news is that the mounting holes fit the vanagon holes. (I have a '90).  They have adjustable arms to accomodate larger cups.  I'm not sure if they carry colors other than black.  

Here is the info from the product label in case any of you want to try ordering from the manufacturer.

Product Name:   Mugger
Manufacturer:
Roba Family Enterprises  (Label also says JR Products)
7610 Transit Road
Williamsville, NY 14221
UPC:  7 56015 45619 7

Cheers,
JOHN

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