I don't recollect what I had for breakfast, much less what Harley did on cop bikes in 2000. The parts catalog only shows one injector part number for all 1999-2001 Big Twins with MM-EFI, including the SERG (27135-97). Any supposed change for the cop bikes would have been in the calibration, not the hardware.
The information I've seen elsewhere makes me think that guy may have sent you a TB from an Evolution bike. The SE catalog for those bikes had an upgrade that included higher flow orange (or red) injectors. I think that higher flow injector eventually became the stock injector when they went to the Twin Cam engines in '99.
See if you can read a part number on the orange (red) and black injectors. The stock injector for the 1998 Evolution bikes was 27218-95, and the stock injector for the '99-'01 Twin Cam bikes was 27135-97. The 27218-95 is a lower flow rate injector.
Jerry