Macbeth densitometer

I just purchased a Macbeth TR 924 on e-Bay, and it arrived without an aperture, and without an owner's manual. Does anyone know where I can get the things I need? Does anyone reading this have an owner's manual that can be copied for a price?
Thanks,
Steven

I have a 524 and managed to snag a copy of the 924 manual, so I can copy it for you. Write me offline at edb@unblinkingeye.com. Don't know about the aperture.