I have posted a link in the website links area.
Lots of stuff is available, but quite often unless you have a QH or Intermotor part number you can struggle.
I needed a fan switch, found on on Ebay quoting an Intermotor parts number, Matched this to a QH quivelent, and bought one of a different brand, then the saga began, the new one was faulty!, I then found a guy on the web who buys obsolite stock and he sold me an Intermotor one for £4.50 inc P&P the motor factor was £17!
The lesson here is we all need to keep a diary of part numbers used on our vehicle, then the local factor should be able to supply 60% of the stuff, the rest can be found on the internet.