Van Cafe does a rebuilt speedo - I got one and it's really accurate:
http://www.van-cafe.com/home/van/page_1343_616/rebuilt_2wd_speedometer.html

It does come at "0" miles though, if that bothers you.

On 1/18/13 15:42, Don Hanson wrote:
>     I've not heard of a Vanagon speedo losing it's speed function and
> keeping the odometer, but that is just what mine begin doing this afternoon
> without any warning or prior indication of problems.
>
>      I had the odometer wheel problem and I also had a bad cable before but
> now the speedo needle sits unmoving on "Zero" while the miles click off
> just fine.   I know from my tach how fast I am going but the speedo is also
> pretty handy and I'd like to restore it's function...if anyone has a
> hint....thanks,

toodle pip,
--
        Dug Smith         | Terry Pratchett: It's almost
(mailto:dug@dugbert.com) | impossible to ride a rock and roll
(http://www.dugbert.com) | motorbike and stay on for three verses.