Eisenstadt bought the complete set in the early-90's which also included large, high-denomination plaques. Everything sold fast since the big collectors back then who were into MOP really liked the shapes and excellent condition. It is a private set that we have no idea who it belonged to. Remnants of the set pop up on eBay once in a while, though I have not seen the big pieces, yet. There might still be pics on Robert's website of the large rectangle. All I have left are a few small octagons in storage.

I doubt there is an ID, anywhere.