Drainage channel in the correct width - Who supplies it?

Hello everyone,

I want to install a drainage channel in front of my garage door; I have space of 80-85 cm in width in front of the door. However, I can only find drainage channels in a width of 1m....
Do you know where I can get a suitable drainage channel?

Regards

You cut something like that to size!

Yes, I had the same thought, but if I cut the galvanized grate, it will probably rust eventually...

Get some cold galvanizer and treat the interface with it.