So I drove today to our local radiator shop, and brought him that hose-elbow, and he gave me that big one...: It's part No. RH1094 for a Holden Commodore (Holden = Opel = Vauxhall = GM) for AU$20. From that I could cut the elbow and the straight hose on top as well. The OE Jag Elbow would have cost double...