I grow mine all year- haven’t bought basil in over 20 years (except for the plants)
Not sure if you live near a Walmart- but you can buy basil plants in their nursery.
Plants and seeds always available online at Park Seed or Burpee.
I used to garden and always had an herb section so didn’t have to worry about buying any. Now that I’ve used up all my dried homegrown, I haven’t been able to find it anywhere. Spring is right around the corner so it may come to growing a few container herbs.