Yes, I think the innards of the pump are probably pretty basic, hence my wish to try and keep it going.
All the automotive compressor companies I have found, deal with air-con pumps not suspension pumps though, so the hunt continues.
I have a new style Range Rover too and the air suspension on that is really good - smooth, doesn't roll much, so the system can work but I'm struggling to find someone to fix it.
Heigh ho...