I eventually have a set of SureSights coming for my XD and would also like to find a competent gunsmith (central Indy). I've asked a few and I've gotten "well, I've never done XD's, but I'll give it a try!". Doesn't instill me with confidence given that sights ain't cheap.
Cory Nash from Nash Gunwerx. Send him a PM and he will help you out. His screen name is phylodog here on INGO. He's also a site supporter.
He has installed two sets of night sights for me in the past. He's quick, and provides good conversation. I met him late one night where he was working some part-time (he's IMPD) on Indy's southside, and he fixed me right up.
I've had Russ at Elmore's do all of my stuff, never sites on an XD for me but they have likely done them...plus just going to the shop is an experience in and of itself. Elmore's Firearms
317-888-5400