Ria, as you will see the case awnings dont sit flush to the trailer - they sit a couple of inches up off the trailer on the brackets.
re the Carefree awnings - just look carefully at the different models and talk to a pro installer before buying. I know that they work well with the Escapes, Trillium's, Surfsides and Bigfoots but those trailers sides tend to be a straighter than the Boler and the Scamps, for the arms that stay attach down the sides.
You can get the case awnings that Scamp uses A&E/Dometic - there web site is located here
and they do have a case awning that is only 8' long which may fit your trailer a little better and you can get an add a room for it.
Good luck with your search. The Dometic awnings are fairly common so an RV shop in your area should be able to point you in the right direction. There really isnt by the way much to mounting them - I had to take mine right off last year to replace the end caps and getting it back on was not all that hard.