Replacement remote control for Luxaire air conditioning unit

I am trying to find a replacement remote control unit for a Luxaire air conditioning unit

The model is LHKA18FS-AAA

I know very little about this brand or AC units themselves as it is in my deceased brothers house

I was wondering how to figure out if generic remotes work as I see some bad responses on them.

I also saw a post from some time ago where someone has hunted high and low but didn't look they had much luck

I also can't track the distributor as I think these were a Warehouse special

Any thoughts, ideas on how to select or find a remote that will work and hence save having to replace the whole unit would be most welcome

Thanks

Trot