You could absolutly substitute it for Yuzu or Calamasi. I do not think you could substitute it with Kaffir lime but neither would I call Yuzu or Calamasi a good substitute for Kaffir. To get an idea of what the flavor profile is like.
I would love to see what a cross between the bifoliate Kaffir and the Trifolitate Flying dragon would result with.
I do need to visit sometime but its hard to justify a 3.5 hour drive. Maybe I can make an excuse for a 1.25 trip when my brother-in-law has his Yale graduation.