So using MIDIsolutions I would need:

http://www.long-mcquade.com/products/2637/Keyboards/MIDI_Interfaces/MIDI_Solutions/Thru_2-Output_Active_MIDI_Thur_Box.htm   to split MIDI to go to Factor being used as clock and expression pedal. 

and then this to bring split back together?  

http://www.long-mcquade.com/products/2630/Keyboards/MIDI_Interfaces/MIDI_Solutions/Merger.htm

I like the simpler MIDIsport 2X2 but it appears it need to be connected by USB to be powered.