I'm with Chris - the local library copy machine is one of my best friends. I can scale up to the exact size I want, then use the image as a template for making parts. For a sideplate there's no need to go any heavier than .09. A lot of cast sideplates are on the order of 1/8" thick, which is way heavier than any originals I've handled. I use rolled brass from Ace Hardware, then use a jewelers saw to cut out the profile (or if I'm out of blades, use a small drill bit and drill out the profile). I wouldn't worry too much about the color not matching perfectly - it will be less noticeable as it ages IMO. Good luck!
-Eric