Or watch/record the episodes on OTA diginets like Antenna TV or ME-TV or whoever is airing WKRP at the moment.There are so many legal issues, ranging from trademarks to music licensing that this won't happen for a very narrow interest group.
Remember, when "WKRP" first came out on commercial DVDs they substituted generic music for the actual hits used in the TV show. Horrible, but the result of legalities.
Those of us who wanted "real" WKRP episodes had to buy pirate recordings.
That appears to be the "loophole" for music license issues as far as WKRP goes.
Master tape rebroadcasts of WKRP over the air can be aired with the original music intact.