The belt/garter situation is the Skingraft Garter Belt in Black. Here is the link to purchase:
http://fiveanddiamond.com/products/skin-graft-garter-belt?variant=938044795
Five and Diamond sell it for less than any other vendor I have seen. It is a little pricey...$250, but given that it is probably $100 worth of materials and a whole bunch of expert leather working time, that is a decent price. I bet the pocket on it is for the sonic device
If that price is a bit much for people, Five and Diamond have good reference pics of it! I'd love to see someone take the time to hand make this, it would be a great project.
http://cdn.shopify.com/s/files/1/06..._legharness-blk_front_large.jpeg?v=1414800700