If anyone is able to sell me some or knows whether or not there are any other downpipes from other models that fit the gsxr400 gk76a (1990), if they could let me know that would be way useful, thanks!

How irritating is it that I just chucked a set down the tip on Saturday?

it kinda is, yea - I dont need them, need them... mine jus has a small hole in that's easily patched, I'd jus rather get it done right than botch it - gutted =(