If you buy the seat lock tumbler a lock smith should be able to make a key for it. The tumbler has a code on itself and the locksmith can use that for the new key.
I lost my key and couldn't get the numbers off the ignition lock or remove it so I used the seat lock to get a key and it worked for all the locks on the bike. Ignition, gas cap, and rear seat.
Well then you must contact the dealer instead of searching locksmiths
around. They will get you the numbers.