trying to source parts

Hey everyone, I’m new to the site and have been looking through some of the forums here and all I can say is wow �� the level of knowledge here is quite impressive. With that said I’m hoping you can help me out here. I have an 82 Honda 200 3 wheeler that I bought a little more than a month ago. Its runs quite well but does have some issues. Such as no idle unless u rip on it a lil bit,engine smokes, and it doesn’t seem to like mid throttle as it spits and sputters and acts like ot missing but will gladly take full throttle or light throttle. That all being said. I know I need to have the carb rebuilt. And the smoking is due to the rings being worn out. So my question is does anyone know where I can purchase a complete engine rebuild kit? I figure that if the top end will need work then I better have it done right and due the bottom end as well to save from trouble and headaches down the line. I did a compression test on the engine and got a reading of about 125psi which seems low to me. Also what could cause the stumbling,spitting,and sputtering at mid range throttle? It smokes the worst when its doing the stumbling etc. I located a shop locally that is willing to do the work and even willing to let me provide the parts needed to do the rebuild. I plan on acquiring the parts needed as money permits. So not in a rush to get them just trying to find out where to get them. The trike runs great and I can usually get it to start on the 1st pull of the rip cord just as long as my thumb is on the throttle it fires right up. So thanks in advance and sorry for the length as i try to be as through as possible when I try to explain mechanical problems/issues online. Thanks again,Bill