It seems that every Cal/Mag/Zinc pills I find have 3 pills per serving. Does anyone know of any that have two or even 1 pill per serving? I tend to forget to take my pills when I have a lot of them, so the more I can cut down the amount, the better.

You need to spread them out during the day anyhow--your body can't absorb the full dose all at once. If three times a day is too much, take one in the morning and two at night.