Slide Out Awning

[2 DA WDS]

Ok, I know theres info out there but I cant find it. I want to order an awning for the curb side slide. I got a number off here but have been told by the dealer that it is not a good number. I called DTree and they have not been forthcoming with any info. They told be to call Dometic and I might as well order blind from Camping World as deal with them. Can anyone supply me with the correct information?

And, has anyone installed the awning rail and awning themselves??