I've been waiting for this forever. It seems like it would be such a simple tweak to the site to have this category.. I just find it baffling it's not an option. Users are the ones uploading all the 19" rack gear they have.. so it's not like there's some big task about finding and photographing the gear itself
As it is, I'm seeing 19" stuff being added into the guitar pedals section and then you have to freeform splat it onto a pedalboard. This works for some 19" synths that can work as desktop modules too, but it's frustrating in general we can't just have nice neat 19" racks with stuff snapping into the available slots