You can use one from certain Jeeps. I bought some a while back for under
$10 and nearly the exact part. Here is a link to show what they look
like. I did not use the Jeep grommet as it was not as tight of a fit on
the tank as the new VW grommets I had. The Jeep valves fit the VW
grommets fine.

http://www.ebay.com/sch/i.html?_trksid=p5197.m570.l1313&_nkw=jeep+rollover+valve&_sacat=0

Mark

Stuart MacMillan wrote:
> Found an '82 in a junk yard, I'm on my way to pull the expansion tank soon.
> Not paying more than $10. I checked the GoWesty site where they are $40
> including shipping.  I'm glad they have so many parts, but this one doesn't
> wear out, so the used option is preferable.
>
> Stuart
>
> -----Original Message-----
> From: Bill M [mailto:billmonk@gmail.com]
> Sent: Friday, June 29, 2012 8:57 AM
> To: Stuart MacMillan
> Cc: vanagon@GERRY.VANAGON.COM
> Subject: Re: Need fuel expansion tank valve
>
> I got a set from GoWesty during their last sale. Be prepared for some
> sticker shock.
>
> Bill
>
>