I used Travel Insured International for our VG trip. They are on the BVI approved list and came up when I narrowed results to show COVID coverage on Insuremytrip.com
I think I paid under $300 for a family of 4. I played around with the numbers to get a premium I could live with. This one had good medical/Evac/repatriation. Like many, I wasn't asked to provide it but I felt better knowing i had it.