I don't have a suggestion for a potty seat. I have 3 girls and 1 boy...I used a red unisex potty chair for my first child, but didn't bother with the rest. Just a little stool so my son could aim into the toilet instead of on it :)....which happened anyway! LOL
Mostly, It's great that you are thinking ahead and want to get your son used to a potty....however, unless you have a reason that he has to use the potty by a certain age...really, don't worry so much about it right now. He is only one year old...and from my experience, not just with my own son, but other boys I know as well, boys tend to learn to use the potty later than girls. So don't be surprised if he's just not interested or uses it every time until age
3-3&1/2! (It WILL go by fast!) When he gets older and actually is interested in it, just have him go in with your husband so he can see how boys do it. This is potty LEARNING- not potty TRAINING. We are not in charge of our children's bodies, except to help keep them as safe as possible...but rather, they are in charge of their own bodies. When we encourage our children to be in charge of thier own bodies, they learn how to understand thier own instincts better, have better self control, and higher self respect and esteem.
Much good energy for joy and peace,
mom of 4, Birth and Parenting Mentor