Both the computers and their cases are exceedingly rare.
We know of one computer and case sold at Sotheby's in 2019. Another case (and computer) is in the collection at the Old Computer Museum.
Vernon Vogt of Seattle has a computer but we are not sure if the case is with it. It may be the same computer and case that was sold at Sotheby's. I have written Vernon to ask...will post here if/when I get a response.
I suspect there are several other computers out there in basements or storage rooms but we are unable to locate any. Even the Computer History Museum seems to have only a brochure about this computer.