Geographical idioms only - Abnormal and Judy don't live here. Tennessee, Kentucky, Virginia, North and South Carolina in particular.
Tobacco farmers grow tobacco during the growing season, and it is harvested in late August early September. From that time until November, it hangs in a barn and undergoes a chemical process called "curing out" by simply hanging in a dry barn with some bit of air circulation. After it "cures out" it is ready to be sent to market to be crushed and diced into cigarettes.
A farmer who has the nicotine habit can during October/November take a big leaf of cured tobacco, roll it up into paper, light up, and smoke instead of going to the store and paying huge money for cigarettes. Hence, they "roll their own chew".
Translated into vernacular, "When a solution doesn't exist, the person comes up with one of their own design," per Judy.