Large Plastic Drain Gully Cover?

[Beowulf]

As the grid keeps getting filled with leaves, I've been looking for a cover for the gully that collects the drains from the bath and sinks in the back garden.

The gully is approx 50cm wide x 30cm deep.

All of the covers I've seen and have found on the www have been 30cm or less wide, like this:

Any suggestions?

Thanks

 

[Hugh Jaleak]

Old fashioned way, cut a piece of wood, (i'd use waterproof ply) to suit. Can always paint it then to match the decor!