Joe,
If you look at the PDF from the link that was provided you'll find that it IS the spec sheet for the 220-2 which is the 142-150MHz version of the Super Stationmaster antenna. The 25-299.9 frequency reference you're seeing is the "category" of antennas that Celwave is putting this antenna in since it's a VHF band antenna (VHF - 25-299.9 MHz). Look further down on the PDF document and you'll find the specific specifications for the 142-150 MHz version. No, I'm not aware of a lowband Super Stationmaster antenna but they do have other models of antennas for lowband that are in the same 25-299.9 category. The other link showed the various versions of the Super Stationmaster denoted by the different suffixes (220-1, 220-2, etc.). Regards, Richard