Our Dollar Tree stores in Baltimore-Washington area sell Hormel Genoa Salami and also Hormel Pepperoni -- you wouldn't think it, but they have it in sell-by dated packaging and convenient size. Don't know what area you live in; but I do know there are a gazillion Dollar Trees around Dallas, so check the Dollar Tree store locator for your city.
Also if there are any fairly authentic Italian restaurants in your area who order Italian specialties, you might work a deal with them to include Genoa salami for you in their order.
No, we don’t have anything out here. The sandwish is fine without the genoa salami. The regular salami is enough. Our one grocery is getting so bad that I’m seriously thinking of driving to the next town to shop. It’ll eat up the gas budget, which is not a good thing when living on an ever decreasing “fixed” income.
Adding a 1/4 C more flour and water to the sour dough will give 6 buns instead of the stated 5 buns in the recipe. I dunno, I just like nice even numbers.