I'm considering a Springfield Armory EMP in 9mm. Holster availability is important. Having used Blackhawk Serpa holsters with my two previous 9mm's, my question is: Will the Serpa holster made for Commander sized 1911's fit the SA EMP 9mm? The Serpa worked well for me with positive retention and the fast draw it provides. Any recommendations on other brands with positive retention are welcome.