We have a customer where we prewired a small surround sound system but the issue was we could only do an in-ceiling system.

Now time to finish and am looking for a 6" speaker that is a approximately 4" deep and are sold individually. All the speakers that I have looked into are either way too deep or are sold in pairs.

I know I could look at some custom options but that is a huge expense for a small living room system and they won't want to spend that kind of money just on speakers.

Can someone recommend a speaker brand/model that they have used in situations like this?