I did a deep dive on fans in that form factor here:
I think the biggest thing to consider is likely going to be mass. This fan gets thrown back and forth, as it’s on the head assembly. Any fan that operates at the same voltage, draws similar current, and has similar mass should be fine, I’d think. Question is whether or not you can find one that throws more air with those specs.
You’re limited by the scoop geometry, and at some point trying to shove more air through it will have diminishing returns, but there’s probably some room for improvement.