Bindertek was new to me, but it popped up first on a web search.
I'm actually suggesting you go to places like Office Depo, OfficeMax or Staples- I've found their stores will often have things their website doesn't, especially hard-to-find/discontinued stuff.
(Just weeks ago, I found a discontinued Olympus digital camera case that was a perfect fit for my guitar tuner...and a couple of picks. $1.)