Several years ago I upgraded the OEM filters that came with my ST2000-XM / CFW9 camera & filter wheel system, and now I am finally getting around to selling the old ones. In anticipation of the question that I expect to be asked, is it possible to tell me who originally produced the OEM filters ? The ST2000-XM camera / CFW9 filter wheel were originally purchased from SBIG on May 30, 2007. The camera serial number is 207051567. The CFW9 filter wheel came with a free set (Item # FL-CFW8 FLTRSET) of 1.25" Red, Green, Blue, and Lunar filters that were installed at the factory. Any help would be appreciated. Thanks.