The clutch cover from any 200, 250, 300, 380, 450, or 550 Series saw will work, as well as a few from older models like the 1-40 and 1-50 Series. Note that the 200 has the bar adjuster built into the clutch cover while certain older models had a different arrangement and so the clutch cover does not have any adjuster built in.
There are hundreds of NOS McCulloch bars plus as many after market bars (Oregon, General, Canon, etc.) available on e-bay every day.
You are unlikely to find any paint that is an exact match for your older saw. There are a number of off the shelf rattle cans that are close, just stroll through your local Walmart or other farm/fleet or DIY store and look around. Several of the industrial safety yellow are very close to matching the old saws.
The wrap handle may have been plated with chrome/nickel, may have simply been zinc plated. Again, take a look at e-bay and you may well be able to find something better. A number of the later saws had painted wrap handles (black) and some had a plastic or rubber sleeve in the grip area, others had a plastic dip coating in the grip area. Some of the models (1-50 Series, Super 250, and 550 for example) had a full wrap handle bar that is completely interchangeable with the original 1/2 wrap version.
Mark