If there isn't something for the 1900 specifically, see if they can 337 it.
After some more thought, unless you really need the capacity, look at the 200/300/350 for this reason: resale. You are looking at $1.5-1.9M for a beat-up airliner. When I checked a few years ago, the really plush Oasis interior for the Caravan was $170k. I dunno, double that for a bigger plane. So, on the high side, you have $1.9M for the airframe, $350k for the interior (don't forget the LAV!), and another $20-30k (?) for paint. In two years, if you have to dump the plane, your market will be very small. Most buyers look for a 19 pax or cargo hauler. They might pay $1.9 for a turn-key plane, but the $350k interior goes in the garbage. It's one of those "That's nice, but it doesn't matter to me" kinda things.