http://ati-radeon-9200.mac.findmysoft.com/

http://www.howtodrivers.com/model556559.html

http://www.driverfiles.net/Video-Adapters/ATI/Radeon-9200-Mac-Edition/download/page,sh,47166,254,5,.html

might work, but I don't know for sure since I don't own one.