I found my pepper spray. Thanks to those who offered suggestions that led me to the right area. There are several gun shops on Ave Francia near Caribbean Tours in Santo Domingo. It is a one way street parallel to 27 de Febrero on the South side. I only went in one store but I assume others have it also.
I was walking in one of the parks with a group of 15 people. One couple got behind the group and was robbed by young men with machetes. The ladies purse was stolen. There are several obvious lessons here regarding being street smart and what to do and not do. The couple were new here and first time in the group.
I have also witnessed an armed robbery of someone in my apartment building about a year ago. They had a cash business and carried home large amounts of cash. Really not smart. They lost nearly $10,000 USD. Someone told the bad guys, one day they drove up, cut the guy off in front of our building, two guys jumped out with guns and stole the sachel full of cash. Gone in 60 Seconds.