I have several of the 48-49 Hiawathas 1.5 HP in the original colors/decals. I have tooled up and have had made the correct size "vinyl decals" for them. I have not decided to sell them yet but plan to use the ones made so far on my engines. I have almost $150 in the tooling. Let me think about that yet.
Paint: Depends how far and what you intend to do. http://www.effenaco.co/store I have talked to him and he has a 1946-1952 Postwar Blue. He also has the dull aluminum silver need for the tank and body but not mixed except for request. You have to use the right prep and etc. AOMCI folks use him
Also http://www.nymarine.co offers paint as well. Many AOMCI like them as well- I have not followed up on him.
I intend to to run my motors and have not decided how far I want to make them beautiful !!