If you're not shopping Brooks Brothers, the Dockers line is about the minimum you want to go. Be sure you don't pick a brand that has a metal claw directly in contact with the fabric.
For real style, get braces that actually button to the pants. This will involve modification to most pants, or a pant actually designed for them.
It's a tough style to carry off. Joe Cocker did okay, but he's always been a bit weird.