Sorry to hear about your melanomas, Openmike, and your house burning down: was that in the recent California wildfires? Hoping for all of the best for you.
As for a song, since Marmite has been mentioned, you could do no better than one of our fellow Mudcatters, Kevin McGrath (McGrath of Harlow) with his "Marmite Song" on how to find this delicacy in a supermarket: chorus "The Bovril's with the gravy, and the Marmite's with the jam."
So here it is, sung by the late Frank Harte: Marmite Song