Hey Jim, that's interesting since my 1985 definitely has the hose breather assy on both my front and rear axles and it has what appear to be factory brackets. Maybe it was a cut in/out based on supply during production?Meshal, I looked at part and it is something we here in the US did not have to my knowledge. We only had the small cap attached directly to the axle, no hose to extend it. Many people remove the cap and make their own hose system with a different generic cap to move the breather up high. For example I placed hoses on both of my axles and the transfer case and routed them to an air manifold up high on my firewall. Water would have to be up to my windshield to get inside the breathers.
Back to the part itself … It looks like -60040 and 60050 are similar, maybe with different brackets. There are some available on eBay and elsewhere but I don’t know if those parts are discontinued too. Maybe the stuff on eBay is all that remains.