Leewards Islands charts for OpenCPN

[masonc]

I sail mostly in the Eastern Caribbean, non-US territories from Anguilla to St. Kitts and beyond. I want to use OpenCPN on my Mac laptop as a backup to my chart plotter. I can't find a good source for accurate charts for this region. Any suggestions?
I have NV CHARTS using their own application.

[seandepagnier]

cm93 should be identical in these areas. Can you find any differences?