Contact David Hemenway @ 303-770-5579 for reproduction sunroof seals.
As for the "O" shaped part, something doesn't look right there. Are these the original cables? See pic below for an example. Should look like this. The lobe on the cable guide contacts the ramp on the track as you're closing the sunroof, which makes the back of the outer panal rise to seal. The "L" shaped bracket is attached to the interior side of the outer panal.