From last year:

My FLAC  (friendly local auto club)  CSAA here in CaliFUNia has the
ability to make a wallet card key from your Vanagon Key.
The manufacturer of the system is a company called AXXESS.  The
plastikey blank number is 43 and it uses the 'A' cassette on the key
duplicating machine.

For some of us the first key is 100USD with a
free premium membership for a year thrown in gratis.  For existing
members the service is performed for no charge.
The result is a 'credit card' sized plastic key thingy.  Will open
your door to retrieve your REAL key or get the keycode from the lock
so Steve Sandlin can cut you a new key.

So check if the plasti-key vendor you have in mind has the Nr. 43 blank AND
the A cassette.

You're in! so to speak.

Pensionerd (hardly ever travels without plastic)