hi
I bought one recently from this fleabay source. very quick delivery.
http://www.ebay.com.au/itm/1-Quality-Heavy-Duty-Alloy-Radiator-Volvo-940-960-90-94-4-Cyl-AUTO-MANUAL-NEW-/360505935511?pt=AU_Car_Parts_Accessories&hash=item53efd40697
but keep in mind there are two sizes, the 450 wide as above and the wider one at 590mm, also avail on fleabay, but a lot more expensive.
hope that helps