[kens]

I recently came across a couple big boxes of ECL boards at Xerox PARC that I think are from a Dorado. But without the backplane, it would be pretty hard to make a Dorado out of the boards.

Some photos: https://photos.app.goo.gl/cn1CV9ts5sINLlwa2 You can see the 10181 ALU chips - these are ECL versions of the popular 74181 ALU.

[ChuckMcM]

Wow, they appear to be about the right size. And yes, it would be impossible to assemble without a backplane, and fabricating one would be challenging even with documentation.