This is how I did it. It’s been through a couple camping seasons with no worries! Some fabrication is involved, but one could also get these pieces from a welding or machine shop.
The L-brackets in the pix below are from ARB:
https://www.amazon.com/ARB-813402-Bracket-Pre-Drilled-Gusseted/dp/B071G3V8MF/ref=asc_df_B071G3V8MF
They are attached to Yakima round bars with these two parts:
https://www.etrailer.com/Accessories-and-Parts/Yakima/Y8810006.html
https://www.etrailer.com/Accessories-and-Parts/Yakima/Y8810007.html
I extended the bolt holes by 7” to raise the awning to 6’2.5”. If I recall the minimum suggested height for the 2500 awning room is 6’2”. I’m not sure if it’s the same for the 2000 awning room. My awning is the 2500, which is 2500mm square, about 8’, so is my awning room.
My risers are 3” wide by 1/8 or 3/16” thick mild steel stock from Home Depot. I cut them out of a 30” piece with an angle grinder, perhaps a 12” length (didn’t keep notes, I wanted full contact with the brackets & awning), cleaned up with a bench grinder and some hand filing to get rid of inevitable wandering cut lines and sharp edges. Drilled the 3-hole pattern matching the bracket and awning, both at the top and the bottom of the riser. This is drill press work; it would be very difficult with a hand drill, possibly unsafe.
I hit the risers with a steel cup brush on the angle grinder, cleaned it up, then rattle-can painted in flat or semi gloss black. I hit the bolt heads with black too.
I bolted on with something from Ace or HD, maybe 5/16” hardware. I don’t think I was able to find nylock nuts in stainless steel, so I went with regular steel fasteners for everything since I’m storing in a garage. If I were storing outside I’d work harder to find stainless. IMO nylock nuts are super important on something like this which will vibrate.
Basically very light machine-shop work, with the angle grinder doing the bulk of the work. You *would not* want to cut this stuff with a hacksaw! Power tools are a must. Safety is important, with good clamping and eye, ear, and hand protection.
When I was young it seemed like almost all the boys knew how to do this kind of stuff, but now I’m feeling like a dinosaur with my little shop in a shed in the city. Working with my hands doing light metal work is a happy weekend project!