I definitely think they deserve a wider audience and the fact that you are now at Vol 10 sorta makes it an 'established' series. I for one am always intrigued to hear alternative interpretations of songs I know well. I'd like to know more about the process of how you discover these.
I'm not sure if a podcast would get you the audience they deserve but perhaps putting them on an established blog site might be a better idea.
You could ask Jose if he would be willing to upload them to his site. Failing that he is well connected to others who have blogs and they might want to have them. I'm sure that established bloggers have already considered copyright issues and deemed it to be a low risk venture otherwise they'd never post anything in the first place.