Do you have a product associated with the technical solution? If so, then you are much farther toward attracting a business/sales co-founder. If not, then you need one. Just like business co-founders need something presentable to show the technical co-founder the technical co-founder needs the same to show the business side. If you say "oh I have solved problem X, but I can't show you the solution", then it is not much closer to attracting a partner than "I have a great idea for X, but I have no idea how to implement it."

tl;dr - the advice is the same regardless of whether you are on the business or technical side : you need a presentable proof of concept.

Yep have product which was successfully used by a (arguably) customer at a high profile institution years ago . I think most people think they are very good, most people aren't, and most of the tiny minority of people who actually are good at starting business have their own things to work on.

> most of the tiny minority of people who actually are good at starting business have their own things to work on.

This is definitely insightful. Finding a person that is both good and available looking for a new project is a double rarity. All the more reason it is a sales pitch regardless of what side you fall on (tech or business). Good luck to you!