There's
Lightning Arms Sports, they are a stocking retailer for many of the "upper end" holsters. How fast do you want it? There are several makers I would recommend that have relatively quick turn around times.
Desibens Gunleather
FIST, Inc.
H.B.E. Specialty LeatherWorks
UBG Holsters
Eric at HBE has this to me in about a month:
HBE Com III - Springfield XDM.
Nate got me this one in just over a month (Hollidays in between)
Goodbye Cheapo XDM Gear, Hello UBG Regulator!!