Thanks for the suggestions Steve + SirNickity.
The digital switch sounds promising, but I want to see if there's a software based solution first.
While I can't seem to find in the library where the cable selection pin is for the WiFly shield...
I was ABLE to find where the cable selection pin is on the WAVHC library in this class "ArduinoPins.h".
I will mod this pin to a unused pin and see if I can toggle between the two shields.
// SPI port
#define SS_PIN 53
Will report back with my findings!