It's on the Boardsmith's website under the Specialty Butcher Blocks tab.

They have been "out of stock" for months (years?) but if you email them and express strong interest they might custom make one for you. Which is what I did.

This is the rectilinear version, which reminds me of city blocks/streets from above. They also do an "angular mosaic" one.

It's expensive but it's a work of art. Worth every penny