Here's a link to the wrench I've found on Amazon: http://a.co/ies2lfD It's a US-made t-handle wrench that is similar to the wrench shown in this video. This is actually a link to a list of many of the tools that I have found to be indispensable in my shop. You may have to click the "Filter" link to show the items in the list. I suggest sorting them by priority. I really like this new wrench because the handle is sturdy and stout, but it's smaller than the ole Shopsmith wrench so it shouldn't be so easy to overtighten.
Be sure to check it out.