What's the last three characters on the code stamped into the back of any of the locks (letter + two numbers).

Someone may have the same lockset, or odd spares with a key (which has the 3 digit code stamped on it). Worth a try I guess. Otherwise a Honda dealer - but one I contacted recently wasn't much help with locks for my '21.

I don't know how many combinations there are, or whether someone would let you know that they have the same key as you, or vice-versa.

Scott