I'm trying to get as much chameleon for my character as possible, I have purchased gauntlets from the dark brotherhood vendor and I have the ring from the daedric shrine quest. I am looking for more pieces that I can buy or can get as loot from an actually permanent location (they will be there no matter what and not that i have to save and reload until they appear in a boss chest). Any help us greatly appreciated and I hope for some awesome tips! Thanks!

If you're on PC, and have the unofficial patch, there's a ring available at the Red Diamond Jewelry in the IC. There's a bug in the original game, where it doesn't appear in the vendor's inventory, even though it should.

Create your own : http://www.uesp.net/wiki/Oblivion:Chameleon but it does get boring running around invisible.