I don't how "exotic" they are. But, here are a few "customs":

My Glock 36 in a Gary Brommeland IWB. This is one of the most comfortable/concealable holsters I've ever had!



My HK P7 rides in a Ryan Grizzle rig w/ my initials on it.



I also have a Milt Sparks IWB as well as lesser known makers like ROG & Murph etc that are produced in 1 or 2 man shops.

Little Bear made this for me in crocodile:



Another one in Crocodile w/ my duty Glock 22