Dear Tom,
thx for your help - finally I have managed to get it again (price is about 1/5 of full licence costs).
However - the purchasing does NOT go over Symantec online store but ONLY via Resellers...
So after finding one company suiting for my purpose (dealing with 1-100 licences; I required only one) I purchased in "usual" way (billing to my home address etc) as in Germany/Austria these companies usually dont offer online stores.
So something to keep in mind if you need to purchase the upgrade assurance quickly - usually this cannot be done in a few minutes online.
Stork
(waiting for PGP supporting Lion...)