I made a replacement for min out of copper, a quick visit to screwfix I got some copper pipe fittings and copper tube, cut the tube up and rolled it into a suitable diameter tube, brazed the seam. I then added the small tubes exiting at the sides and brazed them into place, job done. Total cost was about £5 and IMHO was a much better item than the original item. BMW i3 Electric Car
2012 Full Fat RR 4.4 TDV8 (now gone)
2006 VW Touareg 3.0 TDi V6

Can I order a couple from you sir? just for the two cars we have at home...

Old Fattie is long gone now so I'm not in a position to make any more. I did consider making a batch of them, they were substantially better than the JLR part. It really is an easy job, there are quite a few companies around that make various alloy tubes for cooling systems, they should be able to make one with ease that would be much 'prettier' than mine. The other thing I did for a friend was to drill the plastic housing and screw in a couple of pipe 'barbs'. That worked OK too. BMW i3 Electric Car
2012 Full Fat RR 4.4 TDV8 (now gone)
2006 VW Touareg 3.0 TDi V6