We no longer carry our steel strip binding tool. Our single long handle binder was simple but tended to tire out the average operator making a dozen books per hour. The majority of dealers who owned our binding tool tool went back to staples as the preferred method, and since the binder was expensive (for us and dealers) we phased them out last year.
If you wanted to buy one, It's possible you can find a dealer who isn't using theirs and would sell it. If you have one for sale, please post in the comment below.
There is also a company that makes a tool that will bind the books with the steel strips. They are called Channel-Bind, you can search their name online to find their products. Their smaller models sell for around $300.