A new Banreservas Expomóvil event will take place in the DR soon. You don't have to be in the DR to apply for a car loan for any of the vehicles that will be on sale during that event. All loans will be Banreservas loans, not from other Dominican banks (for now.)
PS. I think the Miami office will be open by the time the Banreservas Expomóvil starts.
PS2. This would be a good option if you have a son/dsughter in the DR, he will pick the car they want but you will be the one paying and you live in the USA, there is no need to go to the DR to apply for a Bsnreservas car loan. You save the costs of the airplane tickets, not a small change for many people.