On this page there is the entry below but it is not a link. It looks like 4 downloads are missing. Looking at the code yes there are no links there. Does someone have these files?
http://sim-outhouse.com/freeflight/Vietnam_Projects.html
Initial SceneryDB The SceneryDB folder including all releases and updates thru 8-17-18, in 4 downloads
http://sim-outhouse.com/freeflight/Vietnam_Projects.html
Initial SceneryDB The SceneryDB folder including all releases and updates thru 8-17-18, in 4 downloads