if you have a Kioti dealer near you, they should be able to sell you a new block, or a whole new engine. I looked around the internet, and saw NO-ONE selling a ck20 block or complete engine, that is very troubling!.. check the price on having the block fixed, it MAY or MAY NOT be worth it.. it really depends on the amount of damage it sustained.. which you have not stated.. I doubt if a Japanese Kubota block would possibly work on a South Korean head, and other parts!.. the WHOLE engine MIGHT work with some MODS though..