For the 10C transmitter, you would purchase your regular frequency module through any retailer who sells Futaba. They use the same transmitter modules as the 9C-series use.

For the 10C, you would purchase:

FUTL15** TP72FM TX MOD 7U 8U 9C 9CS US$69.99

or

FUTL8910 9C 9CS SYN TX MODULE 72 MHZ US$119.99

The 12 FG, 12 Z, and 14 MZ use their own special modules, and you would purchase those modules through the service center. If they have the latest software, then they will easily handle regular channels and the 2.4 GHz FASST system.