These plastic things are called Mud Flap Grommets ((Part number is
865853231A)and are available from many vendors:

http://www.gowesty.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=865-853-231A&Category_Code=

http://www.busdepot.com/details.jsp?partnumber=865853231A

Chris

On 5/31/06, Dave Vickery <davevickery@hotmail.com> wrote:
> If you mean where the mudflap attaches to the side of the van, it is
> attached by a plastic push pin that you won't be able to reuse once you pull
> it out.  It is like the plastic things that hold the door panels in, and it
> is attached to the mudflap by a screw/stud.  So you just pull that out, but
> I don't know where you get the replacement to use when you put it back.
>
>
> >From: Wayne Adamson <adamsonwd@TELUS.NET>
> >Reply-To: Wayne Adamson <adamsonwd@TELUS.NET>
> >To: vanagon@GERRY.VANAGON.COM
> >Subject: Removing mudflap from behind drivers side door
> >Date: Tue, 30 May 2006 21:54:00 -0700
> >
> >How do I get at the screw that holds the mudflap(to protected propane
> >tank).
> >Do I have to take out the sink and fridge. I can't find anything in the
> >archives on this subject. Thank you in
> >advance....................................
> >Wayne " The difference between an adventure and an ordeal is
> >attitude"(unknown) KLR650A14-1976 R60/6-1995 R100RT-1991VW Westy GL-ABC
> >6461
> >MOA-71007
>