Bent some B+Q brackets to go over the sides of the Dandy and then screwed awning rail to that. This is the result......[You must be registered and logged in to see this image.]
Not an exact match but it is close enough.[You must be registered and logged in to see this image.]
As a previous poster noted the slope of the Dandy roof means that a triangle needs to be cut out to level up the doors. The pitch was too hard to peg out the awing well so it could be made a bit neater without the darts, but I still think they will be needed.[You must be registered and logged in to see this image.]
Although it fits neatly over the door when closed, the door fully opened is too high. For the moment I will just live with it, but I may need to think about making the top of the door fold down. I thought about wider strips of wood to lift the awning rails above the Dandy roofline, but I just used hwat I has lying around in the garage. Also I thin the leverage would put too much stress on the brackets and Dandy sides if I did that.[You must be registered and logged in to see this image.]
Finally a shot of the rails and brackets without the awning attached. I will continue to improve the layout, but as I have nowhere to erect the Dandy at home it will have to be work in progress when I am out using it.
One thing I will try is to add more rail on the left (side without a window). It looks nice centred, but then the entrance is through the middle of the awning area. If I offset to the left, I make better use of the space, but the left edge will be even lower meaning even more material will need to be removed.
One thing I will say it that with the rails in place, putting up the awning is very easy. Just getting it up with the first guys in place was less than 10 minutes solo. Fiddling to get the best fit took longer.