These are finally in....
One Piece Door Glass Conversion kits for 67-68 Fastbacks.
If your 1/4 Vents are pitted and stuffed, and your glass is scratched, this kit will save you money.
$1300 for the kit, and it's here in Australia now. Comes with factory green tint.
Kit includes new glass, rails and belt strips.
I can also supply Electric Life power windows for these, to make the ultimate setup, replacing all those 45 year old parts.