The only way to get these Bynar species doffs was from the Fleet Support Doff packs which are no longer sold. No idea if/when Cryptic will bring the Bynar doffs back. Only other way is to watch the exchange for them and hope you have enough EC to buy them.
"STO is like a box of chocolates, you never know what bug you're gonna get."
The only way to get these Bynar species doffs was from the Fleet Support Doff packs which are no longer sold.
You can still get them out of the Fleet Support mini-packs that drop from the lockboxes. As far as I can tell (I've opened them in the thousands so far) they have the same species and the same special Doff abilities as the the old c-store Fleet Support packs.
The only things that differ are the number of Doffs in the pack plus their rarity distribution.
Same thing goes for the Gamma-Quadrant and Reinforcement mini-packs.