You may not believe this, but Target carries a line of dried foliage and flower wreaths. They are really pretty, but not large enough for what I was looking for. I don't know if you ever found any others that you liked- if not you should chek these out. Some stores definitely have a better selection than others. They are in the same aisle, opposite the synthetic floral wreaths.
They don't have the spring line they had in the store online, some are more flower-y, one is that green and made of dried artichokes (prettier than it sounds.) This is a swag online of what some of the wreaths look like in the store:
I love their spring wreath, but it's not online, either. : /