The new makerfarm supplied nema 17's run cool. I expect they are made a lot closer to AUS than they are to the US. just get the model number , order from hong kong, etc. and it's a short boat ride. I can post a pic of the label if needed but i think Clough42 or someone had a post recently about the spec's of the new motors. As Drone suggested, this is a way better solution rather than putting a fan on every stepper. I can understand if you're very isolated the shipping can be crazy though.