Modern Vespa

Bought this PX125e, basically a barn find, but the old couple lost the keys, so I now have to change them all, but I'm running mad while trying to figure out which steer lock fits this scooter. I tried the vin code VNX2T since there seems to be plenty of PXs, but get no hits. Seems to be some different types (this one doesn't have the ignition in the steer lock) that goes in line with older types of Vespas, they are sometimes labeled 4 mm or 6 mm. But by the looks of them, they don't seem to fit because I have this round metallic thing just above mine that doesn't correlate with any of the looks seen on sites, Ebay etc that seems to have this squary thing on top of the cylinder.



Mine

What they seems to be selling all over...


How to change the most common one (but not mine)...
Any suggestions?

Got it out, turned out to be one of those seen for sale. The round thing above the lock was just barrel that slides over the typical cylinder...