I have a 1972 Law Boy, 19”, magnesium deck, offset front wheels. It was made by Lawn Boy for International Harvester. Model number is 3311. It’s yellow in color. I’m looking for a carburetor kit. It still runs great, but it needs a little TLC. Carburetor number is IH-55486-C91. Any ideas? Everyone I talk to says parts are no longer made, and Lawn Boy records dont carry any crossover information.