@John_D1, it is a very broad and vague description of a problem. What is it you are doing (or want to do) with those products and customers? What is the nature of their attributes?
Designing, again, requires a lot of information; thorough investigation of various aspects. I think you can start with information I had already posted, and build on that. All kinds of “large amounts” have some solution - but they are not on their own - lot of “other factors” influence the design in such cases.