Listen to old podcasts on a modern release schedule

I once heard about a website that does this, but I cannot find it. You would give the website an RSS feed, and it would give you a new feed to subscribe to. It would then release “new” episodes on a set schedule. This way you could listen to, for example, a weekly podcast starting at the very beginning, released on a weekly schedule as if you were listening to it when it first released.

I hope one of you awesome tilderinos know a website that does this. Thanks in advance!