Ameriflight is a a good place to start but to get into the BE99's gonna be a long wait. I have friends who work there and have been with Ameriflight since 2006 and are still waiting to get into the 99. There are out station opportunities but even those are slim to come by.
You can try looking into Ram Air or even Planemasters who happens to fly Caravans which would be a quick way to build 1000hr turbine PIC. Good luck.