Not a Hudson River Steamship but a similar New England coastal passenger paddle wheel, walking beam steamship; Bluejacket Shipcrafters offers a 1:96 scale model kit of the SS Portland. You may be able to buy the drawings separately.
Bowling Green State University’s (Ohio):Center for Archival Collections may have drawings for similar Great Lakes Steamships.
The Smithsonian Institution has a model in their collection of the Francis Skiddy. She is a very long lean Hudson River Steamer. They say that they built the model themselves from the builders plans.
There are a number of books about Hudson River Steamboats. I saw that there is a new, exhaustive two-volume set just out: The Boats of Summer by Richard V. Elliott. Fair winds!