I have just left a message with a friend of mine who has had a 4.2 Series 1 (I think it's a 1 - only seen it once) FHC in his garage complete but wrecked for at least 20 years and is umming and arghing (sic!) about restoratation or whatever. It's all matching numbers, and is pretty complete. He even has a spare bonnet in good nick, but for your lightweight you're probably not interested in that. I'll forward anything interesting in his reply.
Best of luck, and if I've got the wrong end of the stick please yell.