The seller that I got it from only had the one listed that I could see. If you would like to PM me I can send you the link to the auction and you can check with the seller if he has any more.
Nice little piece of kit...but with my new truck's key fob, and the tailgate key, and the key for the topper, AND the key for the hitch-ball, I don't think I can add anything and still get the key assembly in my pocket!
That's the problem with today's auto keys, too big! My Highlander is a push button start, but the "fob" that is required to be able to start it is bigger than most key/door remotes.