Hi if you can get a new rad for £75 I would snap it up , I can do you a second hand one ( came from a running non overheating manual disco ) for £25 and the head with valves for £75 collection from near epping Essex
I am traveling to the south coast this morning so if your quick and reply before 9am I could arrange to meet you somewhere or even drop it off for you.
If that falls through I have a 300tdi head I got as a spare from ebay-meant to be tested etc,but never fitted as have a D2 now-comes with all injectors valves etc £90.00