From their online shop:
The new Hay Bale and Cotton Bale are part of our direct line of products.
These are accessories that are only available directly from Miniature Building Authority at our webstore or from our booth at the conventions we attend.
Each of these products are cast in metal, come un-painted, and the figure is not included (is used to show scale).
DIR-040 Hay Bale $1.95
DIR-041 Cotton Bale $2.95