Lucky you! That is pretty unusual. You can buy Mrs Wagner's Pickling Lime at Walmarts here in CA. First year in EB I DID grow a Roma. Super Marzano as I recall. Didn't know anything back then and was despondant when they all got black spots on the bottom.
I had a LOT too! This year for the first time since then I am trying again with Opalka, San Marzano Redorta, Orange Banana and Speckled Roaman. Boxes are several years old and now I know to use Snack. Unlike you, (Silly) I Do have pickling lime on hand if needed.