FWIW, these were also used on Omega Race as well (and probably a few other games), in case anyone has any scrap Omega CP's laying around.
Also, if you have the cones, and you can't find any Licon switches, you can technically also use Cherry LED switches (original or the repros). They won't be as 'clicky' as the Licons, but they'll work, and are the same size and thread as the Licons.