I'm not sure that exists... When you say hosting, that is where the audio (mp3) file is stored and played from the rest of the services use rss feed to "fetch" the link to the show. You could self host it with a hosting service or start your own server like start9, but if you begin to use a lot of bandwidth, your ISP might not like that. @Jack Spirko self hosts his podcast and could possibly give you some insights.