I found the felt in the hardware section at Wal-Mart. It's maybe 1/8" think, and exactly twice as wide as you need. Use scissors to split it.

Clean the loose crud out of the window channel and begin at the front bottom edge. Press the felt into the bottom of the channel. You could probably do the sides of the channels with more material, but just putting it into the bottom of the channel fixed my problem.

Press the felt into the channel and try to make sure it adheres everywhere there is a bottom to the vhannel. You'll find a large gap in the channel at the top rear of each window. I just kept going and snugged the felt tight across the gap.

Roll the window glass up and down a few times. It should feel consideraly stiffer than before; the new felt will cause some drag. Roll the window down and check the felt to make sure it didn't move during your test.

The glue will set up after a couple of days, so if you need to adjust the felt's position, do it as soon as you can.

I'm about a month into 'testng' my 'new seals' including high winds and some rain. No more wind noise and no noticeable water leaks, although I'm sure water is going inside the door itself. Remember to check you door drain holes when you clean your car.

For a 10-minute job, I'm really happy.

Steve