I used to be so intimidated by it, but it adds such a fun touch to projects, and it's so, so, sew ;) easy to make yourself and add a custom touch to a project. Seriously I kept thinking it would be so time consuming and hard to make my own piping, but it took hardly any time at all.
zipper foot for your sewing machine
First you'll have to cut some strips of fabric on the bias. You can see more about that here, and also see how to join the ends to make a longer strip. I cut my strips here 1.25" wide.
Then to make the piping, simply fold the piping into the bias tape. I didn't press the bias tape before this. Just sew close to the piping cord with the wrong sides facing, with a long, basting stitch.
Then just keep sewing it in with your zipper foot, keeping the sides lined up as much as possible.
Then tada! You've got some custom piping that literally took minutes. Go ahead, revel in your awesomeness. I give you permission.