There is no party for us at present. I basically see two viable options for feminists:
OPTION A:
Organise a mass ballot-spoiling exercise. It would have to be consistent in how exactly ballots are spoiled in order to get attention. If done properly, it could have one hell of an effect.
OPTION B:
Stand for election or organise to field other, feminist-friendly candidates on every.single.level. Contest every seat.
In either case: be noisy, be heard, be annoying as fuck! The secret recipe to success is essentially to make people think they're better off listening to you than having to keep on putting up with all the fuss you're making!