Well, then there’s a business idea for another co-op right there: one that does nothing but connect potential co-op founders. A marketplace of ideas and abilities, if you will.
Also, your co-founders will contribute time as well as capital to free you. The challenge then becomes decision-making. IMHO, if you can come to terms with relinquishing control, you can be part of a successful business in a co-op easier than in a classical setup.