Prusa MK2 Better Part Cooling Fan Duct with support

I've been printing a lot with PETG which is what my hotend parts are made from, and this is causing the screws nearest the hotend to heat up. The screw closest to the hotend is actually for the part cooling fan, but because I'm printing PETG that doesn't use much cooling, it is starting to sag since it isn't cooling itself down natually and it has no counter support on the other side of the part (just an alignment pin). It was sagging to the point where it was 1-2mm from hitting the model I wa