Well the NDPis always an option. If you kind of like the conservatives but you don't like the current candidates you should probably get involved with your local writing association and see about helping to pick a candidate that you like. Or if you've already got a conservative MP in your writing meet with his or her policy committee or them directly and talk about what you'd like to see different. You'd be amazed at how much of an effect that has and if you feel that way then there's bound to be others who also feel that way.
Democracy isn't about just showing up once every four or five years to vote after all 😁