small back window, sliding glass options?

[Woogeroo]

Howdy folks.

I am curious about the sliding glass options for the small back window trucks.

I know these were a dealer installed option or do it yourself aftermarket option back in the day.

I'm just curious about different ones... quality ones... one sliding pane or two sliding panes of glass, etc..

If you have one, please post up an image.

I'm just curious what is out there.

Thanks.

-W