I just received a box of photo equipment I won in a bid on shopgoodwill.com. I bid on it for several items which were in the box, but not for the N8008 that came with everything. Surprisingly, the 8008 looks to be in nearly new condition and seems to work, except it is missing the focusing screen. I know the B screen is standard, but what are some other choices. Is the screen compatible with other Nikon 35mm slr's? Thanks for any help.