There are good sources available....
There are quite a few sources specific to what you are hoping to find when it comes to dictionaries although finding a US English/ Spanish spoken in the Dominican Republic is really narrowing your choices down but as you mentioned (US) English / Latin American Spanish is available. In my experience, VOX dictionaries have good references that are region specific and one in particular comes to mind.
Here is one I have and I have had it for years. I bought it out of the blue not realizing how good the content is:
Vox Diccionario Compacto Espa?ol E Ingl?s - Vox - Google Books
I remember browsing in a bookstore many years after purchasing it and just looking at it again because sometimes a newer edition comes out and I remember the store clerk coming up to me and saying- 'careful with that dictionary. It's very Latin American' meaning the words, expressions, idioms etc'. I told her it's okay. I already have it and it is indeed a good one.
It's a good dictionary with a lot of grammatical information as well as a complete section on idiomatic expressions used in the Spanish-speaking world.
-MP.