L Series exhaust advice please

[rcs66]

HI all

I am about to do the exhaust on mt L series, I like Brumbie's set up, and I think this is the way I will go.
I just had the carb rebuilt, and plan to fit a K&N filter, and Better coil.
Would like a nice deep boxter sound, but don't want to look like a wanker.
Does anybody know where to go in Sydney ?
I went to Midas today and they want about $550 for a stock system, I DON'T THINK SO GUYS.
Ceers:)