Doing a little online window shopping tonight. I found this airline seatbelt buckle belt online, and I think it'd be a good alt for Oswin's belt. You could trade out the fabric belt for leather if you wanted to, or you could just modify the fabric belt. I don't have money now, but I'll probably be purchasing this next semester when I have money. ^_^
http://www.buy.com/prod/airline-buckle-style-seatbelt-belt-adjustable-24-38-inch-waist/232837117.html?listingId=221932436