[sudo-discuss] Converting KiCad to Seeeed Fusion?

Hi all, Is there an open source tool or KiCad plugin that'll convert a KiCad PCB file to whatever format Seeeed Fucion wants? I found Osh Park super easy to work with as they have a nice web gooey to do this and can accept KiCad PCB files. Seeeed Fusion, however, has instructions on exporting Gerber files manually, which I followed, but which their system did not accept. It seems like the kind of conversion that could be automated away with some software. Googled around, didn't find anything. If you know of something that does, this, I'd like to use it. Thanks.