I came across
NetXfer which will cost me once the trial period runs out but does a great job of taking a link like the one below and downloading it just like Free Downloader Manager does with regular http addresses.
rtmp://184.73.202.215/archives/mp3:archives/1283629244.mp3
It has the additional, and in my case very needed, feature of being able to import a list of addresses from a text file. This allows me to generate link lists in Excel and then once a week import them into NetXfer for downloading the shows of the prior week that I am interested in all in one overnight operation.
Thanks for your help Stream Recorder.