fwiw the exact encoder part number is Bourns PEC11L-4220F-S0015
https://octopart.com/pec11l-4220f-s0015-bourns-19504852?r=sp&s=eMyteuzMQzCEWqAJJlG4Ng
11mm is a standard size, so others might fit but have different output pulses.
(although I should point out opening the devices and repairing yourself will void warranty)