@futeko Nice Monkey says this one would be Ok with my Egreat A8 and it is cheaper than a used Egreat used Remote so would it be OK https://www.futeko.com/products/AC118.php
That is the standard IR remote of Zidoo. But in fact that one works too as it reacts on any Android remote (=annoying for me). Also the Himedia one should work too for the same reason and probably has a better key match.
I do prefer the Riitek MX3 (RF with a dongle) myself as an alternative. Used to be sold also by Futeko but available in many places. Has 4x IR programmable keys + RF, Pointer mouse and a full qwerty keyboard on the back. Some versions of it also have a microphone and a full programmable keyboard using IR for all keys. Others have back lighting but all are called MX3 (with different brands or no label).