Come on Todd, hardly anybody uses these any more. I'll bet there's lots of these tucked away in old garages and tire shops. I used to find $1000 paint shakers for under a hundred bux by checking old lumber yards and hardware stores. They would get a new modern paint shaker and toss the old one in the back room or warehouse. I posted these because they have pictures. I'll bet most of us on here wouldn't know what they look like.
Hunting one down would be a good club project for the for the "Swedes" or the "Iron Curtain Cruisers".
They even work on radials. They will drastically improve the ride of most cars with bias ply tires.