I saw these on ebay and I think they would work well in our vans. They are made for boats but look good and clean.
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=270549220185&viewitem=&sspagename=STRK%3AMEWAX%3AIT
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=270549232755&viewitem=&sspagename=STRK%3AMEWAX%3AIT
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=270549220185&viewitem=&sspagename=STRK%3AMEWAX%3AIT
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=270549232755&viewitem=&sspagename=STRK%3AMEWAX%3AIT