I had to go up to the unit to get some bits so I looked at the awnings. Not sure it's what you want.
There is a little used 1800 x 2000 awning in good condition with a complete downstairs room. annoyingly, I got it dirty getting it out to look at it. other than that, it's never been out of the bag! It has full sides with door, windows and access to vehicle plus it has a zip in groundsheet. Not sure of the benefits of that other than you can choose to have it or not. It makes it easier to chuck the other bit in the washer I suppose. Everything is there to connect it to the awning. There's a zip bit that slides in to attach to the outer end and the other slides into the awning back plate. The top and sides all then clip on to the poles. It's pretty good but 1800 x 2000 which might not suite your build. It would be brilliant for a SWB Collie maybe. If I didn't sell it, I'd be tempted to stick it on the Hilux to be honest. Couple of camp beds in the and I'd be sorted.
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The other awning was a bit harder to get to but is a Terrain 2000x2000 standard affair. Been used but still serviceable. No room with that but the ARB 2mx2m room would fit. Both are a bit musty but not nibbled by mice!