@Escarabaj said
"I recall reading that the masons have an appendant body which is research-oriented and has access to "retired" rites. I believe that Memphis-Misraim was somehow officially put to rest and its rituals are available for inspection. Of course that doesn't mean you would work the degrees but you could study them. If you are a mason, I'm assuming you are barred from joining working "clandestine" lodges?? I'm not even sure how it all works."
That would be the Grand College of Rites www.grandcollegeofrites.org/ they've published quite a few old rituals. You may also recognize the name of the current vice-chancellor 