The KX3-2m module is lower left
I ordered this during Dayton and it arrived this week after a 3 month wait. It took about 20 minutes to fit into the KX3. Measurements showed 2.5W output off 13.8V and the W5HN/B beacon was audible on a whip attached to the SMA antenna connector, so sensitivity seems ok.
After arriving in England I also tried out its vhf performance see http://g4fre.blogspot.co.uk/2014/09/144mhz-portable-backpacking-activity.html and http://g4fre.blogspot.co.uk/2014/09/50mhz-rf-survey-of-malvern-hills.html
I originally also ordered a 4m transverter module, but after seeing warnings about the limited number of times the two RF cables interconnecting the modules to the KX3 could be plugged/unplugged, I gave up on the idea cancelled the order and reverted to the external 70MHz DEMI Transverter
Closeup of KX3-2m module