If he does e-mail, you might also send him a link to Nick Gorton's book on FTM health--or print it out and take it along. But I think it's better to give him the info up front so that he is ready when you show up. You should also see if you can hunt up a couple of different consent forms used by informed consent clinics. I've seen one or two online.
When you see him, you can easily explain (without stating a preference) that some physicians do informed consent, some require a few psych visits, and some want the whole three months of psych visits. (You might not want to suggest more than three months, and you might not even want to mention three months' worth!) But once you establish that different doctors choose different routes to HRT, you can simply ask him what he is comfortable with--or say that you would like to discuss the various options with him. You don't need to whip out the form right away if you think it will look presumptuous or pushy.
If he's not at all comfortable with informed consent, he will probably let you know right away. If he's willing to discuss the options, you can kick ideas around.