I have been emailing safariland for six months or so, trying to get a definitive answer as to whether or not they were going to develop a light bearing holster for the fnx .45. Most of the responses I got said they would forward my request to the development people.
I talked to someone at safariland today through facebook who said they would need 500 orders to develop an SLS holster and 1,000 orders for an ALS holster.
Just FYI for anyone else who is looking for a safariland duty holster that's made for this gun.
Looks like it will take a large agency issuing these guns to get the holsters made.