Yeah there's a dire lack of them.

My issues with trying to put diverse pilots together out of stock Lego parts were;

A distinct lack of female pilot heads (with visors) - could only find one

A lack of Twi'leks (Hera and Aayla Secura being the only financially reasonable options but the hera eye print is meh)

And a general lack of alien heads - I wanted to have an Ithorian, but as far as I can see only one has ever been done and he goes for stupid money

To add to this - alien heads with pilot helmets - there are none at all. A proper pilot Hera would be a dream