looking for giant plastic bag for a toy chest

I need a plastic bag big enough to fit a toy chest 19 " tall, 22" deep and 40" long. My truck bed isn't covered so I don't want the chest to get wet if it's raining or the roads are slushy.



I live west of Minneapolis so a local source would be nice.



Thanks,

Bill

(.-.)

looking for giant plastic bag for a toy chest