Grandpa Simpson's onion belt -- which episode?

Hello. I'm writing an article in which I want to quote Grandpa Simpson nattering on about his onion belt (see below). Can anybody tell me the episode title, date and writer(s)? Thanks!

"We can’t bust heads like we used to, but we have our ways. One trick is to tell 'em stories that don’t go anywhere—like the time I caught the ferry over to Shelbyville. I needed a new heel for my shoe, so, I decided to go to Morganville, which is what they called Shelbyville in those days. So I tied an onion to my belt, which was the style at the time. Now, to take the ferry cost a nickel, and in those days, nickels had pictures of bumblebees on 'em. 'Give me five bees for a quarter,' you’d say.

"Now where were we? Oh yeah—the important thing was that I had an onion on my belt, which was the style at the time. They didn’t have white onions because of the war. The only thing you could get was those big yellow ones..."

Episode is "Last Exit to Springfield" when C M Burns wants some strikebreakers.

Just plug the name into Google and you'll get all the background information on the episode. One of the best!

Thanks a million!