I would not buy anything without a deslinde in this country. We're just finishing the process with one parcel of land now. We bought the land almost 40 years ago, and had a title, but since the newish law requires deslinde we stared the process two years ago. The property was properly surveyed, gps coordinates etc., and first paperwork submitted to the province then. We've just received a letter telling us it's been approved and we'll have the deslinde in May.
There are a LOT of forged titles in DR, title insurance doesn't exist in the way Americans know it. A deslinde is the government saying this land is owned by this person.
So, if the property you're interested in doesn't have one, proceed carefully or keep looking. As I showed above, it's not something done quickly as part of a sale, it takes time, average two years. It's also not cheap, thousands of US dollars.