Any Yamaha dealer should be able to get this for you. If you come up craps, and If I can find mine I might sell it to ya since I have a Givi and don't need it. Of course you'd have to get it re-keyed.
(I suspect but don't know, that Yamaha or part number to replace all 3 locks, again they'd have to be re-keyed).
Yamaha part number (for an 06 Sidebag lock)
SKU: 5JW-W9451-02-00
Should be the same for the top case and also the same for all years me thinks.
Shows back ordered from Xtreme powersports.
-MD