Hi, Morphy! :wave: I was just thinking about you yesterday, that I hadn't seen you around in a long time.
Back in 2000 and 2001, Bob was posting his sermons regularly on his website. Therefore, these sermons can still be heard (for free) at his archives pages:
http://kgovarchives.com/kgov2000.html
http://kgovarchives.com/kgov2001.html
They are scattered in with his talk shows, so just look for recordings with the word "sermon" under the link.
You can also
subscribe to receive the latest sermons every month on an mp3 CD. (You might also want to consider the Bible Study Album subscription. It's similar, but tends to focus on a particular book from the Bible.)
Merry Christmas, Morphy.