great job bud, makes my 1st little mod look a bit naff. Just a bit though. Good luck with the ac ryan hex mesh. I couldn't find any anywhere, closest was a 240 rad grill but wasn't quite big enough for me. OC now have a phobya grill similiar but the hex size is mahoosive. I even had a friend in the eng trade look for stuff - I'd searched for mesh but it's actually called erf sheet. It's available but in 2000mm x 1000mm panels.
I ended up using 12" speaker grill from 'butlins', the design of which meant 10" of the diameter was almost flat. Did the job over my blowhole but no where big enough for your side panel. Butlins did have some dirt chep atx cases with mesh sides with a small frame. Might be worth looking at this option - buy a case with suitable mesh, steal a panel and mod the case with acrylic sheet/window and sell it on.