I don't think the JapSpeed Y pipe is bad, I have one on my car and no fitment issues at all. With JapSpeed it was mainly their K2 exhuast (although I also have that on my car and not really an issue) and their customer service that has gotten them their bad reputation.
I think a popular y pipe is the XYZ though, sure the traders will be able to provide these or suggest alternatives. Try the usual:
CS, ZMANALEX, Tarmac, R35LEE, Abbey, Horsham etc (sorry I missed anyone off, not intentional). They will give you good options and prices. I understand your beef with Scorpion but it is a good exhuast and you may have just got some bad attitude stall guys, the traders will look after you and as said they have replaced exhuasts without too much hassle.