OEM Honda parts are available for just about anything on an Elite 80 , especially if it has to do with mechanicals and not cosmetics.
Typically , a "rebuild kit" for a carburetor is a gasket set . Honda usually just sells all the rubber parts in a kit, and offers the other stuff, like float valves and jets, piece by piece. The idea is , you take the carb apart, clean and inspect everything , replace anything that is damaged or otherwise not working , and reassemble it with new gaskets throughout. Companies like K & L and Keyster offer more complete kits, but not necessarily for every application. These kits usually have jets , needles, and float valves included in them , but not always.
On the actual topic of buying online, you may very well be able to find an entire carburetor offered online for that bike , but keep this in mind : Online sellers are notorious for "stretching" the application chart for their products. They will take a carb or or whatever which fits a specific bike , and list it as fitting a bunch
of machines that it doesn't
really fit , at least without modifications and a lot of screwin' around. Their motivation is greed, because the more applications they can list for their their product, the more potential buyers they can attract . The whole mail-order aspect makes returns much more difficult for the buyers , and they know this . They'll take your money, and hope that you don't jump through all the hoops to get your money back
when the part doesn't work.
I can't tell you how often a guy comes into our shop , all pissy , and throws some part or accessory on the counter that he "bought online, but it doesn't fit my bike" , and expects us to produce some magic adapter that we can sell him for $0.99 which will make it suddenly work on his machine. Of course , we are just jumping for the chance to provide after-sale support for some lowballer who sells crap on online that doesn't really fit the bikes he lists it for, not to mention Mr. Customer, who prefers to buy online instead of supporting his local shop. And , of course , if we don't produce that magic part and sell it for a dollar, and instead tell the guy he is SOL , we are just another "Stealer" trying to screw him over.