Best of luck on your project. I wish I had the time to build like the old days. Never had a .40 SS but I had a .60 and still have a 90-1.20. The .60 was one of my favorite plans.
The canopy may be hard to come by. I once had an Ultra Sport that lost it's canopy. I built one in place with stringers and balsa. When I covered it with a contrast covering it looked great. Super Sportsters also look good as an open cockpit. I wind screen can be made out of an old Windex bottle. A seat back out of an old shirt or pants and you got something different.
David