The humble zipper is the most popular method for closing things, and they are in so many places that they are only noticed when they break down and stop working. In fact, zippers are kind of notorious for breaking down at the least opportune time. However, like every other piece of machinery, they will wear out and need to be replaced as a standard thing. When you are looking for replacements, go to www.zippershipper.com to look through their selection of styles and colors.
They sell zipper chain by the yard, so that if you have a number of items to make or repair, you can buy the length you need. Then you can buy the sliders separately and construct your own zippers to fit your needs. Go to http://www.zippershipper.com/zipper-chain-by-the-yard to see what they have.
Zippershipper also carries zippers in a variety of materials, including brass. To see their selection of brass zippers, go to http://www.zippershipper.com/brass-metal-zippers.