You could try taking the door lock off and trying to get a locksmith to make a key up to it, some of the more talented ones can do it but its a pain in the arse.
Other than that try asking VW, not sure if its noted but worth a try.
Thats the good thing about hondas and mazdas, you can get a key cut by just removing the door lock and quoting the 4 digit number, sh!t hot if you wanna nick one and have screwdrivered the lock out.