Another thought: I am thinking that .010 connecting rods are still available for most K-series Kohlers.
A local machine shop might be able to just grind the crank undersize for a new rod. Yes, I know a rod is probably over $100.
I got Carolina Crankshaft in Charlotte, NC to both straighten and grind .010 a K241 crank for me about 6 years ago. I thought they were very reasonable on price.