I have a full cover for the Mokee Dugway, but unfortunately can't tell you who made it. MD was a year old when I bought her. The original owner lived in Raleigh NC, but had her on a lot in Morehead City on consignment. The salesman said the owner had $1800 in the cover.
You might call the factory on this one and see if they can advise you, but it sounds like a custom cover is the route you'll wind up going. My canvas covers from the Delta QuickSet on the bow pulpit to the swim platform and outboard. I like it because it allows air to circulate in the cockpit, but keeps out rain and snow. Good Luck!