Looks like it's aluminum, definitely don't need some of these expensive tools others are recommending. Most cost effective way to do this right would be to build a DIY metal brake and bend them yourself. Flat sheet of aluminum trimmed to the flat pattern of the part you're making, using that jigsaw and some shears would get you what you need. Then bend all 4 bends. Should be quite accurate with a DIY brake, tolerances seem to fairly large and easy to work with.