When I separated my top mine ripped. I am not surprised to see Toyota's price above $300 for that piece. Some folks on MUD have been saying that the bottom seal for a garage door works well, but I can't see how that would be possible with the curves you have to deal with.
I would take the top apart though, rust can form under the fiberglass cap.
Rising Sun Bio
2F "Brahma" + Lockright, tach, Warn 8274, FJ60 Power Steering,
no more Sanden OBA
1FZ-FE factory lockers +
Safari intercooled turbo, CDL switch, cup holder, Metric TLC leather, heated seats, JDM switches, PUMA OBA.
Warn M12000 waiting for a bumper.
Limited TRD 2UZ-FE SOLD