Here's how I made my windows tracks. It's very simple to make.
Here's the glass (yellow tape on the glass was used for shipping reasons, may leave it on until the build is done)
Using this for the inserts (picked it up at Pepboys for $20)
Measure your door
1x1x16ga tubing
Cut off one end leaving it 1x3/4
Cut in half down the middle on the back side
Apply the molding
Bend each track individually to the appropriate contour
Fit it to the glass then tack weld it