I just re-did mine. All pieces of the t-roof for my 87 GT.
Felt Strips (you will need 2)
Get the 9 Piece T-Top Kit that 50Resto sells.
and a few odds and ends.
All said and done shipped to my door was $860 Cnd Funds.
the 9 Piece kit was on sale for 229 US which is a sweet deal.
I replaced every seal on the car, all door seals, all hath seals etc
Since it was getting all new paint I figured might as well get all new rubbers too
I also ordered door runner channels on the advice of 50resto that turns out you don't need on a t-roof so that 860 cnd would have been more like 720 had I only got the stuff I needed.
You guys ROCK! 50Resto never came in any of my google searches (damn I have to get better at search strings), it's like I've discovered sex all over again!