When I want to refer to the people (and organizations) who supply me with the goods and services I consume---that is, those of whom I am a customer---what word do I use?
"Customee" gets the meaning across, very effectively I assume, by piggybacking on -er and -ee being paired in many other contexts. However, it sounds awful (IMNSHO).
"Seller" is less foreign to most ears, but only speaks to what the other party does, not specifically that they do it in relation to me. Also, and this is probably connected, "my sellers" could easily be mistaken for "the salespeople I have hired" or something similar.
"Supplier" doesn't sound too bad and speaks to what they're doing for me. However, I have heard that term used more of suppliers of capital goods---that is, inputs to or tools which facilitate production processes; I haven't heard the term used in reference to those who supply me with consumer goods (the things I want "just because"). For that reason, I think it may sow confusion.