The way I see it...An English officer could have picked one up from a dead foe in Nepal, he took it back to England with him, he was then sent to America because of the uprising, here he was killed in battle and his beloved kukri was lifted by one of the rebels, the rebel lived through the revolution and carried the kukri westward with him.
Any reason why this could not have happened? Just once?
There's a famous case of a neolithic flint tool that was dug by a noted archeologist in NY State. It was identical to tools found found along with Neanderthal remains and thought to be 80,000 years old. That's 20,000 years older than anything else in the U.S. associated with humanoids. When they tested it, it was found to be of the same mineral content of the flint in the Neander Valley. This briefly lead to speculation that Neanderthal's were the first to travel East to West across the Atlantic. They returned to the site and dug like fiends. But all that was found was a bunch of Lenni Lenape/Six Nations artifacts.
So, it is now believed that stone tool was tossed in a German riverboat, that ballast was dunped to make room for goods taken back up river. Then the toll had to make a series of such dump & pick-up transfers, who knows how many times, with at least one trans-atlantic crossing, and end up in the site of an Indian village along the Mohawk River.
Or, it could have been picked up as a curiosity by a Hessian soldier and carried to America.
At some point it was burried, either by plow or poked in around a loose fence-post into slightly older strata.
Or some forward thinking tourist buried the thing with a chuckle and a wink some years past.
Such things are called anomalies (and/or anachronisms) and drive archeologists knutz. Just think, every time we toss a spent gunflint or fire a round ball we are extending the usage of certain "primative" tools in the eyes of future archeologists.
You should see the stuff in the Peabody Museum brought to New England by the whalers from the mid 1600's on. Trade is an amazing Who's to say a Kukri didn't get from Nepal to Hong Kong to Madigascar to Tripoli to the Azores to Havana to New Bedford to ???
Stick it in your belt, and if someone gives you lip draw it and start picking your fingernails with it and say: "You know, the sailor who's body I took this off in Baltimore had an attitude like yours."
You don't always have to play by the rules. It wouldn't be accepted in a judged event, but the deer and squirrels will never tell if you wear it in the woods.