Sort of depends on where you are heading to
The missionaries are sort of a closed group with this sort of information. Once you are here you can find out from the different churches.
Probably best bet is to peruse the Classifieds in the List?n Diario for opportunities. there are a lot of vehicles on the market. Look for Toyota Land Cruisers or Prados with diesel engines. Also full cabin pickups-Toyota and Mitsubishi diesels are, again, the preferred maakes...
Just where in the central part? La Vega? San Jos?? San Juan de la Maguana??
HB