We can merge official and workshop Unturned maps for you using our Unturned Map Merge Tool.
Join our Discord and create a ticket there. Provide a list of maps you want to merge and info how to arrange them. We charge $30 USD fee per merge.
We only merge the maps using our tool, but we don't finish the maps. In order to make the map playable, you need to finish it yourself or hire someone to do it for you.