Do web searches for "historic lath and plaster restoration rochester ny" and "historic lath and plaster conservation rochester ny." You can see what comes up, and widen your search to Syracuse, and do some using your county or region name as well. You can try substituting "Victorian" or "historic."

It may help if you spell "lath" correctly. A "lathe" is a woodworking tool and not what you need.

Contact any historic preservation organizations in your region as well.

I’m not far — I’d go to a local hardware store, like Ace, and ask them if they have any recommendations.

Neighbors. I presume homes in your area are of the same era and need similar work. Plasterers are very hard to come by these days. Good ones are even harder.