BINGO! Bates only had males (apparently most people don't want berries -- isn't that the whole POINT of holly??!?!), but Gro Wild in Fairview (much closer to me!) has several sizes of both.
I can get two 7 gal females and two 3 gal males and plant them together. Or just 1 male and figure it would get them all, which is what the lady on the phone suggested but I don't want one plant to look more full than the other. So I will see when I get there. Or I could get 3 gal of everything. I want it to look pretty good right away so maybe the bigger plants make sense?
And then I will be out there directing the bees all summer LOL.