They do say that the Harris stuff is still in use. More interesting is the fact that all the bulletin stuff is now transmitted on 4 discontinued Icom 756 PRO II's, 2 discontinued Ten-Tec Omni VI's, and 1 discontinued Ten-Tec Orion I. Well, at least the PRO II has great AM.
As I read it, they have discontinued using the Harris exciters, but still use the Harris amplifiers. They claim they were increasingly having crapout problems with the Harris exciters.
Once upon a time their bulletin station was all custom built. Ordinary amateur radio appliances didn't have the capability of simultaneous multi-band transmission for their bulletin service.