Thank you, lather. Chris at short tronics is willing to try and move the chips from my circuit board to the circuit board of a new/used fob.
I think it's a gamble, but worth trying if I can get another functional condition fob for like $50. They're $350 new, but if I could find one missing the ID then it would be worth only as much as the passive key, which is $50, I think. Would you be willing to part with one of your fobs for that amount? (no pun intended)
If not, does anyone know where I might find a transponder fob in functional condition for that price? Probably missing its original ID. Partzilla website indicates 3 or 4 part numbers for c14's, and kawasaki's diagram for 2010 indicates that 21175-0296 is the right one. If there's a cheap transponder out there on its own, I wonder if one could even discern easily which year(s) it's for/the part number...