If you look at how referrals are made now, you will see that they do not involve any formalized bodies in any of the provinces. Family doctors make referrals to surgeons, psychiatrists, and so on, and doing so is all pretty informal, so if you want a system put in place, there is nothing to build on currently.
I suspect what is going to happen is that consumer groups will spring up. I know my organization is interested in helping doctors who are interested in this to form organizations so that it may become well known which doctors are going to be involved and which ones aren't. That is the model used for most abortion services in Canada currently. I would be reluctant to institutionalize a referral system, but, on the other hand, we have to make sure that the patients' autonomy and needs are put at the forefront, rather than what institutions and doctors may wish to do.
We need to have some public way of getting referrals from doctors who do not wish to participate so that a patient's care is continuous and people don't get dropped, because this is a critical stage in someone's life. This is not a stage in your life when you want to be digging around trying to find a new family doctor. There needs to be some thought given to how that's going to be made operational, and I don't have a ready solution for you, I'm afraid, at this point.