Truzi WOW!! You are a Googling god. Perfect and thank you. I won't ask how you found it, because magicians usually don't want to reveal their secrets!
Now if only I can find the "thumbs-up" button so I can give you a kudos.
Glad I could help.
Coincidentally, I had wanted to be a magician in elementary school and high school. I've a trunk of equipment in my parent's attic, a small collection of books, and even a straight jacket (I was into Houdini too).
As for Googling, it's no secret; it can just be a bit nuanced and tedious. You can't always search simply for what you want. You find things that reference other things, and search for those other things. It's like an investigation or scientific query where you follow leads, make inferences, then check your work to confirm.
I'd traced things like Fink-Roselieve, Regal Photo Products, etc.
When I ask a question here you can bet an extensive web search didn't quite address my specific needs.
Here's a link to a very general Youtube search you can play with:
https://www.youtube.com/results?search_query=yankee+agitank
The videos should give you a better idea of the Yankee tank than the instruction sheet I linked. You'll also find a number of other options that may be better if they are in your price-range. I'm guessing you want a daylight tank, though could be wrong. If you're patient you may find a good deal - a few years ago I picked up an unused Jobo 2509n reel with 2520 Multitank for $50 on ebay, and I just roll it on it's side.
However, I've since decided, for color film, I want to develop in a darkroom by dipping into stainless tanks. So I picked up a new (full-price) B&W King 4x5 stainless reel and tank (which is a daylight tank), but haven't used it yet. Otherwise I would have opted for a Stearman Press SP-445 - actually, I may still get one. I've considered buying used stainless sheet-film hangers and tanks, but they take more fluid and I don't think they can double as daylight tanks when I want to do something that way.
Have you considered a Paterson tank with a Mod54 reel?