Morning Barry
Welcome to the Forum
Take a look at www.realoem.com put the last 7 digits of the cars Vin into the search box it will bring up your model then search the body section. You should find all the information you need you should find exploded drawings that indicate where stuff goes and the part numbers which will help in your search. the bonnet I believe is just mechanical alignment and hinges with gas strut assistance. Once you have the information Google BMW Specialist Recyclers/Dismantlers and you should then be able to contact them to see who has what you need
Good Luck with the Project let us know how you get on
Dave