Crawler harnesses

Anybody make their own harnesses? Where do most of you get your parts?

Thanks in advance

I use/make them often.  Gander Mtn has some stuff- clevis'/blades.  Lock 3 bait shop in Pittsburgh has some stuff- clevis'/blades.  Wal-Mart has plastic and wood beads.  Owner sells glow in the dark rubber beads, but they are hard to find on a shelf.