1967 john deere 112 parts

Hi
I bought a 1967 john deere 112. When it ran it smoked. We started tearing it apart and found that the carb was completely broken. We think that might have to do with the smoking. Even if it doesnt we still need a carb. I would also like to replace the head gasket but that doesnt need to be done like the carb. If you have these parts or know where I can get them that would be great. It is a tecumseh 10hp.
Thanks,
David