Seems no one here has. I know Hummers used the pickup controls, but not same exact years crossover.
Maybe call Leroy to see if he sells them and knows.
Maybe try on hummernetworkforums.com but definitely you need to take a picture of the control head. Also- Dave that owns Bluehummer. com sells led for every hummer gauge and light I know of. Maybe he would sell them for it and have the know how.