Ed,
   Welcome to the Oliver clan.  I don't know where you are located, but if the wheel is not repairable, I would try some of the Amish communities as I believe they still have shops doing repair as well as making wheels. I am sure they could duplicate what you have. You may well be able to find a used wheel to match the one good one too, probably at antiques shops for a rediculous price. Try putting a "wanted" ad in the HPOCA magazine also. Personally, I would try to repair the original. Did the spokes shatter?
I would be intrested in what you decide to do...a good project <!-- s:wink: --><img src="{SMILIES_PATH}/icon_wink.gif" alt=":wink:" title="Wink" /><!-- s:wink: --> 
                  Cal