So, as this thread received quite a few responses, I thought some might be interested in the outcome. I decided to put Mike Grogan on the case and as I guessed he had a lot of trouble finding anything any good in my price range. Finally, he came up with a 2013 Mazda 3, which was a car I had suggested I liked, and yesterday I was down in Santo Domingo buying it. It churned through the traffic jams of SD coming home, cruised along the Autopista Duarte and over the steep hills back to Cabarete without a problem except for the engine light coming on. I will have my mechanic check it with his computer tomorrow. Overall I was very happy with Mike's service again.
For people who have dealt with him before, he now works with another guy who also knows about cars and who drives Mike around SD. This guy also knows all about title transfers, checks that all is in order and does this work for Mike's clients, so that makes life a lot easier.