Check this site!
http://www.theengineersemporium.co.uk/index.html
go to "steam engines" then "marine engines" then down four listings to a
twin cylinder inclined with feathering paddles & all the bells & whistles,
for Only a king's ransom!
but it sure is pretty!
Dave, In the climatic wonderland. (near (but not TOO near) San Diego)