One of our arms broke a few inches from the hinge, shortly after we bought the mh.
The model # is located on the roller tube, you'll see it when you extend the awning.
I used a extendion ladder to support the awning at the break.
You can download your PDF's here
https://www.e-carefree.com/ecarefree30/product-library
I Googled my part # for a list of sellers.
Getting the thing apart is not bad if you're familiar with working with E clips...I am now.
Amazon etc sell E clip tools.
Good luck and keep us updated.