Here is a picture of the one I use. My daughter painted the handle pink, and that is very helpful if it gets accidentally dropped on the ground or in the hay. Rancher3, that is a very nice twine cutter that you made. Personally though, I would prefer the handle to be "parallel" to the hook and knife, rather than perpendicular. It seems more "user-friendly" this way, as well as better fitting in the side pocket of the door on the pickup.
Glad someone is still making them, as the supplier for the ones we've been using has quit the business.