Ronnie, I believe that is a Grimm tedder. They were made in Vermont or Newhampshire I believe. I don’t think they are made anymore but there are still quite a few in use up here. Pequea (Lancaster, Pa.) Makes a very similar tedder and they call it the fluffer tedder; 7′ and 9′ ground drive or PTO. Pequea has a web site. Might be easier to find the Pequea used I would think.
I use a Grimm and like it. simple and reliable, does a good job in most conditions. They won’t ted out a rained on windrow very well and the rotary tedder is better with the light second or third cutting. The Grimm will leave one or two clumps of hay and those were the whole reason you set out to ted that light hay.