Phil Read Replica's used the CB750 F2 as the donor bike.
David Siver Spares is a good place to find new old stock parts and they will be able to help you, have your frame and engine numbers handy.
A guy called Andy in the VJMC might be able help with any bodywork you might need. Mobile 07720 449991.
Hope this is of some use to you.
Cheers
Grizzly