Hi BlueWhiteSky,
Overland have some B1900's, pay is really bad though.
Overland Airways
Wings Aviation, they fly Kingair 200 and B1900-D. Approach with caution though, their chief pilot is so f..king arrogant. Put it this way, they are in need of F/O's and no one wants to work for them. Most F/O's in need of a job would rather stay unemployed and wait for something better than to go and work for that arse of a chief pilot.
A much more pleasant option if you can get in, is Mobil, they have a B1900 and pay is very good. Sorry dont have a website for you.
AP