The rather wonderful modosc (Jonathan Schatz, sometimes known as divisionbyzero or the best/only hope of getting any kind of tech support from Buchla during the BEMI days) has developed a modern reinterpretation of the incredibly rare Buchla 700 instrument designer, which includes MPE compatibility (and is to be released in several formats).
Keep an eye out here, along with info about the project and original machine:
https://modo.sc
I'm excited!