The dealer will not sell you a spare key capable of operating the shutter door, just a plain/flat metal/uncut one ?, the only solution they will offer and that will restore scooter to normal is to replace the "Lock Set" possibly around $600+ with labor
. Cheap solution is to have a good locksmith disable shutter (or DIY) and make a key, around $100-200 depending on amount of disassembly required, etc. BTW, is virtually impossible to arrange/know magnets positioning on a Chinese key clone of Ebay, without the original key as a sample.
Just out curiosity/challenge, I'm going to order a Ebay key to see if it can be done
. Wish I was a little closer and not so busy this week, I would come over and give you a hand with this or bring it over. IAC, Good luck.