Jim,
The 14MZ, 12Z and 12FG are all native FASST systems when used with the TM-14 module, just not dedicated, in that price range a "dedicated" transmitter is a questionable investment, unless you're sure that todays 2.4Ghz SS format will remain the standard for a long time.
The yet to be released JR 12 channel has been announced that it will be available in a modular version and a dedicated version, not a bad idea since JR may eventually go with a FHSS system.
Pete