Brother Gray,
If you can get the radio tunes into the digital realm and burn it to CD, the Tascam CD-BT1mkII CD/practice amp is great. I use it to learn gospel tunes all the time off of CD. You can slow down the songs without pitchshifting like what happens with tape. You can also fine tune the pitch of the CD to your bass so you don't have to retune for every song. (But most gospel artists seem to be pretty true to a 440 Hz tuning!)...
I am glad to hear that there is a 24-hour gospel radio station in Denver. I'll be moving there in about 4 months!!!
Hope this helps...
Bryan