Here’s a couple of suggestions for your keeb: (LMK if you have questions. This is one of my hobbies; I can talk about it all day lol)
https://rkgamingstore.com/collections/65-keyboards?filter.tag=connectivity:wireless
https://www.gloriousgaming.com/collections/wireless-keyboards
Yeah, OP should NOT get one with an aluminum case. The K12 I linked has the option, unless I am mistaken.