[JRTJH]

You may be able to send the dealership photos of the damaged parts and the overall awning. They could (if they're willing) diagnose the problem and order parts based on your photos.

If they won't work with you, possibly your insurance company would consider a claim ???

You didn't give any indication of the brand or model of awning that's on your trailer, so providing links to the parts breakdown is not possible. However, you can always order a replacement side arm for your awning from the manufacturer (at your expense). Typically they range from $400-$1000 depending on the brand and style. I wouldn't recommend that expense if your awning is still in warranty and "should be repaired" by the manufacturer.