Get either 18 guage steel or aluminum angle.(avail at home depot)
3/4x3/4x 40
At an HVAC supply get contact cement for foam rubber insulation( RUBATEX or ARMSTRONG) comes in a 1/2 pint can, about $7 {looks like Gorilla snot}Follow instructions on can, don't breath the vapors.
Trim the angle to fit behind the broken tabs. then glue the whole piece in.Drill the angle for #8 sm screw, at the old tab location. It's stronger than before.
Be sure to align your windows before replacing the inner door panel.I like to repad the felt slippers on the glass too.The window should seal inside the rubber lip. if you pour water on the top it should drain from each end of the top glass. On to the door glass about 3/4in from the top edge.
Patience man ,T-tops are like owning thoroubred finicky but way cool on sunny days.
Somethin I just remembered. That push tab fastener at the front of the trim. It's only good Once,and I've never found a glue that held another in place.
I broke down and drilled the trim,(#8sheet metal screw) and countersunk the hole. Then put an insert(LOWES) in the door hole.
The reason being, that trim will vibrate and eventually crack&brake. Even highway speed wind will do it. A carwash would be suicide.
Good luck (mah t-top brutha)!