to this i know it impossable do . i haf=d 6500 wism2 card same probem ,i had one advanage i new what prob was cisco agree work with me fix the software in return i get all updates
i got 5 updates and now works perfick. but out all sold mine has only update shortly after they close all support so unlikely any one get updates , but do what i do is very hard they dont like work with people only busness but they have histroy with me , but u new controler wont work with old ap most likely wich leave every one in pickle but there other ways around this, that so much cheaper,
cisco forces u by new hardware why these certifice cant be replace , althorw on this update i beleave they remove certifice athencation on it, when i look logs i dont see it , not like was , certifices fine if u replace them on fly cisco wont do this as even a 10 year old ap will work for most people , end life u do know usa has law that states that the people have right to repair any device and busness must provide them what is needed to do such repair, if cisco knows u can recode the device that u dont need there help other then update, u might get it , might is huge word with cisco as i had call them 4 times get them work with me good luck
