i doubt i can "unconfuse" you , but when "phase II" of OGR started over the summer, some limited # of OGR-24 WU's were released. they have since dryed up. it is possible more will be released some day i suppose, but there is no way to get them seperately from OGR-25 units
you just tell the client you want phase II OGR units and someday you might get lucky and get some more 24's (or not)