ARB air compressor a disappointment

I finally got around to dismantling the ARB air compressor mounted under the bonnet of the Landcruiser.  Sure enough, the exhaust valve has failed, again.  Last time it failed, I got a new one from ARB for about 70 cents plus $5 postage.  This time is was informed that the old compressor is no longer supported by ARB, and hence I can't get a new valve for it.  They say that they supported it for 3 years, and now I have to buy the new model.  Since I paid $360 for the old one, and hardly had any use out of it, I'm a bit annoyed that I have to discard it for the sake of a 70 cent piece of plastic. 
ARB really should have recalled the old compressors and replaced the flimsy nylon valves with brass or stainless steel, rather than turning their backs on customers who bought their poorly-engineered product. So I'm researching a new air compressor to go in the Cruiser, and chances are it won't be from ARB!!