I have a Windjammer and could not buy a cover off the shelf. Check out CalMark online. They are pricey but they are custom built to the shape of your trailer and they have a 6 year warranty as compared to 2 years for the ADCO covers I've seen. They will send you a sample kit with the material and strapping they use. They also send a chart for door location, air conditioner, vents, spare tire, ladder, etc. I added an extra drawing because of the v-nose feature and added those dimensions. It fit like a glove when I got it. No regrets here with their quality and the investment.
Randy and Patty
2015 Sabre 33 CKTS-6 Platinum Edition
Reese 16K Slider hitch
2014 Ram 2500HD Crew Cab 6.7 Cummins Diesel