I just purchased an eSim online from Digicel. You need to create an account and provide ID via your driver's license, passport or national ID but once I got my information entered it was a pretty simple process. 30 day vacation plan (they have 7 days, then 30........go figure) for $50 US. 25GB of data and 180 minutes of local calls. No option to do it online with Flow but I did get an eSim with them last trip. Again, it was a 30 day plan as they only had 7 days as well and I was there for 2 weeks. Can't remember the price.