Where best to buy downpipe/cat section?

[tmdigitalart.com]

Hi All

As in title,anyone know where cheapest to buy new downpipe/cat section for 6n2 2001 gti.
Just trying to get my polo back on the road,has had that many problems,pretty much had new
engine fitted,all work has been done by brother who is a mechanic,one of the problems was
that the cat was full of oil and crap so he and his colleauges removed it as causing other problems,
should have car back in few days after a 6 month wait but have mot at the end of this month so need
to buy a new or decent second hand one or even borrow one for few weeks.

any ideas?

cheers
tom

[alexperkins]

GSF sell pretty good exhaust pipes etc. May be worth checking that out.