Check facebook, I picked up a 5mb diesel for £100 including all ancillaries, starter and mounts that is destined to for a friends series 1. Hadn't been run for a while but started on the bench easily enough. good service and it it is ready to fit.
There used to be loads for sale cos owners took them out to be replaced with tdi's but they are pretty rare now. There must still be a fair few tucked away at the back of people's garages though.