I scrolled back several years in search and only saw male sets for sale.
Yup. I built a completed set years ago, back in 2014 or 2015. Should be out there somewhere. Hard to imagine it would get split up, but you never know.
According to EL, F parts were looted:
Foot x 8
Shin x 12
Thigh x 13
Harness x 11
Arm x 3
Gloves x 4
Helmet x 10
So up to 3 sets can exist currently, and the possibility for the 4th from current gold rush, if winner of that prize is F avatar (idk if winner choose as he wish or based on winner avatar)
I got 2 parts (F) in my mix set. Can sell if you are trying to make a set or buy if you want to get rid of parts 
why hasnt it dropped since 2014? Did they remove it from the loot tables?
Guess that is the date since Arkadian golden door instance not really works well.
I’ve got a full Dune Rider F set… all parts T4/5