If there's another Dufour
2800 in your area, perhaps the owner will let you get the dimensions of his spray dodger
off his boat, then you're in a position to see if you can fabricate the frame for yourself. Once that's on the boat, measure carefully, allowing extra for seams and hems, get the fabric
you want to use and the fabric
for the "windows". If you have to sew it by hand, buy new sharp needles. If you are patient, you will be able to make something you will feel proud of--and save a lot of money
. Modifying an existing, used frame might be possible, and also save some euros.
Sew the windows on the dodger
material before making the cutouts for them, so the fabric retains its shape while you are working on it.