Chris,
I don't know why you singled me out, so I hope I can help! The floorpan and a few panels are interchangeable between FE and FB, such as sills and (I think) the boot-lid. The roof-line is different at the front edge, but to be honest I'm not sure whether the rear windscreen is the same, which is I guess what you're asking. Certainly the rear-door side of the C-pillar is different, FWIW.
I will have a look in my master parts catalogue and see if the rear screen has the same part number for FE through to EK when I get home. Alternatively, you could check out the part numbers on Rare Spares site
http://www/rarespares.net.au for both glass and rubbers. That might be some indication?
I hope this is some help.
RET