There can be 5 ways to find a co-founder. Trust me, you will definitely find one. Below are those:

1. Post it on your LinkedIn and let the connections that you are looking for a co-founder.
2. Post it on your Facebook wall and share it in different groups.
3. Post it on your twitter and also request your followers to retweet it.
4.Call all your friends and family members and let them know that you are looking for a co-founder.