I got one off ebay mate, got it in an auction for like £60 delivered, ended up being a Japspeed one and I'm happy with it.
Here ya go, mine's exactly the same...
http://www.ebay.co.uk/itm/NISSAN-350Z-Z33-3-5L-S-STEEL-EXHAUST-Y-PIPE-DOWNPIPE-D018-/381134932005?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item58bd698825