I made a set off water proof panniers using hooks bolts and nuts from the hardware store and Kitty litter buckets. Since I buy the kitty litter anyway, my cost was less than $5 ea. You can put large items over the top of them (like a large package of toilet paper) with a bungee or strap. If you are firm about buying rather than making, check it out.... Cobb is the name I think...