From the Sci-Fi show Defiance (2013-2015) is Alak Tarr's (Jesse Rath) bespoke perizoma (aka loincloth) that was used in season 1 episode 10. This item was obtained in the official Defiance VIP Auctions. It however came unassembled so for now it's a bundle of material as well as the beige G-String underwear he wore underneath the perizoma.
I'm always on the hunt for more items, feel free to leave a comment or check out my other items.