There's no such thing as an owner's manual for these like a car has. The 'manual' for your year basically consisted of an envelope that contained all the owner's manuals for each appliance and some components like faucets. We do have some manuals on the forum here, but you can find some by just searching Google for your make/model number of each appliance, such as Dometic RM2652.
Sunline Coach Owner's Club - Sunline Owner's Files
2007 T-286SR Cherry/Granola, #6236, original owner, current mileage: 9467.8 (as of 5/26/19)
1997 T-2653 Blue Denim, #5471
1979 12 1/2' MC, Beige & Avocado, #4639
Past Sunlines: '97 T-2653 #5089, '94 T-2251, '86 T-1550, '94 T-2363, '98 T-270SR