I am late but i found a way. Extract the Id from the link with a regex or somethin else
EX: https://itunes.apple.com/podcast/state-trance-official-podcast/id260190086
load this link with the ID https://itunes.apple.com/lookup?id=260190086&entity=podcast
Get the "feedUrl" from this json file.
The &entity=podcast is not necessary but it may help