i got a scorpion one off ebay, it was from a seller called junction26m1. I did the buy it now at about 4pm and it was with me the next morning and it was christmas time aswell! I would definately use them again.
To be honest though i don't think it's made any difference. Fitting the decat did though. It's an evo 9 i have
No reducers required as the joints are but together flange joints. I know mate of mine bought a scorpion front pipe for his 5 and the fit was rubbish due to the flange which bolts up to the turbo been welded at the wrong angle. Should be ok on a 7/8/9 though as they have a swivel flange