Straight coat patterns with different cup sizes

What it says in the title. I want to make a wool winter coat that’s straight cut but most patterns I can find only come in a B cup and idk how to do an FBA on a coat pattern. Idk what pattern size I am as pattern size varies drastically by company but I’m a 45 inch high bust, 49 inch full bust, 42 inch waist, and 52.5 inch hip