I found an engine bag at NAPA or Autozone, but it really isn't much more than a plastic trashbag, but more mil thickness. I'd try a trash bag after spraying down the parts with light oil.Squirt into the cylinders too.
I guess I could simply use the tough 39 gallon trash bags we have at home and tape them up tight. I am also planning on using a DIY desiccant that I use in a gun safe. Silica Gel Kitty Litter and landscape bags can make what ever size I need. Just staple them into bags and then pour in the kitty litter.
