Thanks for all the suggestions on vanagon keys, folks!  I shall find a
real locksmith, I think. I called the local VW dealer, they didn't
have the blanks either.  Luckily I'm going into NYC tomorrow, and I
like to walk around the city a lot. So hopefully I'll find some real
locksmiths in my wanderings, and one of them will have the right
blank!

Meanwhile, I'll work really hard to not lose the one I have. And maybe
I'll even find the lost one? I'm sure it's somewhere in the van...
unless Matilda ate it, of course!  Nice, crunchy snacks, those vanagon
keys.

Joy