Shopping help needed!

So A only has one sweat suit that fits, and we have, ahem, lost it. And now that it is cold out the child needs at least two, preferably three sets, much to my husband's dismay as he hates them with a passion. But when shelpping a three-year old to swimming and gymnastics in the cold weather, it makes the most sense to me. Easy on, easy off, relatively warm. Except I can't find them anywhere. She won't wear the kind with elastic at the bottom, which is the only kind being shown at Old Navy and Target (although I have not been in Target for a while, so correct me if I am wrong there). I have looked online at all the usual places, and there is nothing. Carter's has tops, not bottoms. Oshkosh had big girls, not little. Even Gymboree seems to be lacking in them this year. WHAT are little girls wearing for comfort and warmth these days??? And have you seen a plain old sweat suit anyplace???