Try contacting Lizzie Mae.
https://lizziemaesbirdseed.com/backyard-bird-watching-enthusiasts/ Rob should be able to tell you if anyone in your area is selling their pigeon feed. Often times a pigeon club, or some member from the club get deliveries of their feed and then sells it. They have many different mixes, and also sell many individual grains like peas, wheat, corn etc. Also if you have a Wild bird's unlimited in your area, the wild bird food they sell is made by Lizzie Mae, so if you asked the owner of the store they might be able to order whatever pigeon feed you wanted and have it delivered to the store along with their normal order. It's very nice feed, and I was using it for years, but for me it was a longer drive which I got tired of and started using Browns from a closer store.