TL;DR: Since everything is bigger in Texas, I decided to go bra shopping while visiting the Dallas area! Loretta’s Intimates carries cute bras in sizes 30-48 A-JJ (UK) = A-N (US), sports bras and swimwear, helpful staff, reasonable prices and a sizable selection of sale items.
They don’t stock 28-bands due to low demand so they loaded my fitting room with sister sized 30-band bras by brands including Curvy Kate, Freya, Panache and Tutti Rouge, sleepwear and swimwear. (Side note: If you want 28-bands, tell your local lingerie store.)
They understood that 30-bands are not ideal for me and did not put any pressure on me. I am glad that I tried the 30F (UK) bras on though as several of them, including the Cleo Breeze Longline Balconette pictured above, are on my shopping list in 28FF (UK) now.
If you are in the Dallas-Fort Worth area, I definitely recommend visiting Loretta’s Intimates. Hearty thanks to The Lingerie Journal for suggesting that I visit Loretta’s!