Drooping Sub headliner

[78subgeorge]

The headliner is drooping [about 3"] over the front seat of my '78 Sub.

It appears that the headliner is supported around the perimeter, plus at the dome light.

Any suggestions how to support it in the middle?
Are there any ribs to screw or glue to?

Thanks

 

[Big D]

Is it just the fabric that is drooping? Most headliners are fabric that is glued to a molded piece of stiff cardboard. If it's just the fabric you can take the liner out and get a can of 3M spray glue and glue the fabric back in place. If it's the backing material then that will have to be replaced.