The horrible intake was on sale for $125 AUD on Gumtree from the bike's maker who had 3-4 made up at same time. I have posted it earller. It may still be available from the guy's Custom bike website in or near Perth WA.
Some exhaust gurus insist that header tubes must all be equal length...and this is why you see some tubes going forty ways to Sunday.....I am not sure it makes that much difference unless you are trying to get race performance. I think for most of us there's enough latitude to make a tasteful design.