The pinout of the module of the FF3 T3UCP is the same of the more modern Futaba radio, like the 3vc, 3vcs, 3pk and 3pks, so every module that works into the newer radio will works also on yours (you must use the PPM modulation)
.
So both the Futaba and the Hitec combos work well with the 3ucp.
Plus there are also other brands that works, like for example Spektrum but excluding the HRS version(
http://www.spektrumrc.com/Products/D...ProdID=SPM1014 ) or the cheaper "china" 2.4GHz modules (Corona, FrSky, etc.).
If you want to continue with the 40MHz modulation, you can also take a look on ebay; some Futaba 40Mhz modules appears quite often and at good prices
(like this one ended a couple of days ago
http://www.ebay.co.uk/itm/280714235606).
Bye
Ema