Max, I looked back at your photos to see your 101, and if you desire to go 100% correct for judging it will take a bit of work I think, and you alone will have to decide if you want to take the time and expense to change things to make it 100% correct.  

I am not an authority by any means, but I think the export models were the same as North American machines with regards to color, graphics, and pinstriping.  I believe your tank decal is 1931, and your chainguard is two piece like the 741 Indian.  The paint shades may be different but you can see that on many old motorcycles when all parts are not painted at the same time, red is a difficult color to match out of the can when some paint is 90 years old!

So if the color is the only thing you want to change then go to a top painter and have them match up the shade with a computer and then paint those parts only.

Looking again at your 101 pictures you have a wonderful bike!