Just to let anyone know that's interested. I just installed a Spektrum DM9 module in my new Taranis Plus transmitter, and it works great! Already bound 2 of my Spektrum receiver-ed quads to the Taranis, no problem. This module cost a bit more than the orange modules, but I've read too much bad stuff about them being temper mental. Taranis switches automatically to the plug in module, when you select a model that is bound to it. Pretty cool.
http://www.ebay.com/itm/Spektrum-DS...-10X-XP8103-/191637118666?hash=item2c9e765eca
http://www.ebay.com/itm/Spektrum-DS...-10X-XP8103-/191637118666?hash=item2c9e765eca