Remove windshield.
Remove old glareshield. Replace with leather backed with 1/4" foam.
Use beaucoups contact cement. Rivet windshield back, making sure you
use plenty of sealant against the rain.
That should give you about 30 hours of fun labor. It's what I did to a
'66 Skyhawk.
While you're at it replace the plastic eyebrow, which with the age of
your airplane has to be in tatters. About $200 from Plane Plastics.
Enjoy!

Failing that, just use cereal boxes or chart cardboard and make a
template, then have your local carpet guy cut a piece of nice velvety
stuff to fit and sew a border on it so it doesn't unravel.
Enjoy! BTW, make sure the material complies with the FAR's for fire
resistance.