Looking for clip-on flip-ups

So, I've been looking for a pair of silver clip-on, flip-up sunglasses for a few days, and it's proving to be quite difficult. My glasses are 57mmX 49mm, and I've been trying to find clip-ons that are slightly oversize just to be safe. The problem is, most reputable sellers either do not have the right size, or they don't come in silver. I'm willing to try sketchy places like iclipons.com or cheap Chinese brands from Amazon or Walmart if someone can vouch for them.