Ace Hardware used to carry small percolator pots, and I have seen them in outdoor shops in the camping gear section, and in down home catalogs like Vermont Country Store. Although I prefer the stove-top version to the electric, I think you were wise to stock up. Finding them is somewhat random, so when you find 'em, it is smart to buy an extra. If you live in a long-settled areas, you can sometimes find them in yard sales or flea markets. Younger people tend not to have them. If you buy 'em used, just be sure they have the basket and cover that fit, since replacement parts are harder to find than the entire pot. Now it just takes an "influencer," some jazzy looking young person, to be pictured hovering over their percolator and a steaming cup of coffee at their web site or Facebook page, or Instagram, or whatever's the current social media, and these pots will appear everywhere at exalted prices. If you have a choice, stainless steel is better than aluminum, retains heat better and is more durable, I think.