I have found some and have been learning to save seeds.
—
I’ve been trying to buy heirloom seeds when I find them and then seed saving the past couple years, too. Someone suggested the book “Seed to Seed”, seed saving and growing techniques by Suzanne Ashworth. It just discusses vegetable garden seeds.
I bought it, but have only browsed it for particular plants. I’ll try to read more over winter.
I would also recommend Carol Deppe’s “How to Breed Your Own Vegetable Varieties”. I has good info on seed saving, but it also tells you how to create new varieties and adapt them to your needs.