dude, definitely its cheaper to import the end cans or full system yourself. i'm speaking from my own experience. i imported my RS3 from the States for just SGD$1280. installation only cost me $70. you do the maths. while Motoworld quote me a price of SGD$1500 for the same system with installation. Motoworld claimed that the RS3 they import is from Japan but the weird thing is that i got confirmation from Yoshimura that Japan do not produce RS3.
you may just wish for the looks so end cans will be enough. and in that sense, get from Motoworld as theirs are street legal. it'll be a headache