Log in to your account and click Destinations.

Select View Feed next to Libsyn Classic Feed option, or in Quick Links at the top, copy the link next to Libsyn Classic Feed. 

Then you can paste this into the Import Podcast Settings section on Podcast.co!

Log In to your Libsyn account, then click Settings. 

Click Redirects on the left hand side.

Put your Podcast.co RSS Feed URL into the Feed Redirect URL box.

Click Save and then click Yes on the next pop up box to confirm the redirect.