Howie, that IG is looking really good. The decks came together nicely. It's nice to see that you were able to help it get back in shape.
The Morris, well, again, I apologize. I knew the rails were punky but I did not realize it was that bad or that it had been like that before it was glassed. I don't think you will have too much trouble getting some Mahagony. You might try Pittsford Lumber. I've scored some hard-to-find woods there. Worst case you could splice two shorter pieces.
The Rushton decal should be 2 inches tall and about 1.74 in width. I am not 100% certain of the height since the top of my decal was removed when some bozo bored an enormous (not really, but any hole drilled through a deck, large or small, is a criminal act, IMHO) hole that removed the tip of it. I believe 2 is within a few hundredth of correct.