Thanks for the additional information. To replace your air conditioner covers on your 2006 Keystone Raptor you will want two of the Replacement RV Air Conditioner Cover item # MA00-325001.
I have linked a couple of diagrams with the dimensions below. view full answer...
If you measured the width of your trailer's electric drum brake shoes as 2-inches this should be fine as long as the brakes' diameter is 12-inches. Such 12 x 2-inch electric drum brakes are quite popular on RVs like your 2005 Keystone Cougar. This size electric drum brake is suitable for axles rated from 5200-lbs to 7000-lbs and these are what are typically supplied on travel trailers.
Brake shoe kits for this 12 x 2 size brake are shown on the linked page. For example, for manual adjust... view full answer...