I just checked, and SeatExpert.com, which I use in addition to Seat Guru, does list Egypt Air if you provide the flight number and date. It is actually a very useful site, especially because some carriers change aircraft depending on the day of the week.
We flew from Cairo to Dubai on Egypt Air before CAMEL, and though we were supposed to originally be in J-class, Silversea changed it to Y class. It was okay.
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Eugene