I think you have the paint scheme mostly correct. I'm attaching a few pictures from 2001 show in Plain City, Ohio. I think they are fairly correct, although I'm sure there are some that would debate this. I haven't seen any with center hubs painted orange, and I think the belt pulley was all green.

There was a discussion on the Misc board about paint colors, you can find that here:
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I'd give Dumont's a call to see if they have a PPG number for the dark green. You can find their number, plus the decals you'll need at <!-- w --><a class="postlink" href="http://www.oliverdecals.com">www.oliverdecals.com</a><!-- w -->