I don't think I've ever seen one (although in truth, I wasn't looking very hard)!
2¼X3¼ became somewhat common with press photogs after WWII film price increases. But the craze would be shattered in 1959 when Nikon introduced it's 35mm F body. These became obsolete overnight.
Nowadays what it would be excellent for is turning some of your shorter focal length faves into dedicated portrait lenses. 2¼X3¼ portraits contact printed can be jewel like.
This fits almost ALL of the common Burke and James 4X5 and 5X7's including Grover's. 6 7/8" square with a 6¼" relief, it probably fits a lot of other stuff. Maybe even my Deardorff if I changed the pins.
The finish and woodworking on these is remarkable. BnJ was making quality stuff at a bargain price. I think it's worth $55 + $11 more to ship in USA