I found some on Amazon by Elomi( UK sizing) and Goddess (US sizing), which are good brands in this size range.

$36: https://www.amazon.com/Elomi-Womens-Plus-Smoothing-Underwire/dp/B0014VGKWG/ref=mp_s_a_1_3?dchild=1&keywords=38gg%2Belomi&qid=1601706807&sr=8-3&th=1&psc=1

$41: https://www.amazon.com/Elomi-Womens-Plus-Size-Underwire-Banded/dp/B01N0D5JBH/ref=mp_s_a_1_6?dchild=1&keywords=38gg%2Belomi&qid=1601706807&sr=8-6&th=1&psc=1

$30: https://www.amazon.com/Goddess-Womens-Petra-Underwire-Banded/dp/B07DKP4DGB/ref=mp_s_a_1_5?dchild=1&keywords=38i%2Bgoddess&qid=1601706957&sr=8-5&th=1&psc=1

Shape matters as much as size, so these may or may not suit your shape, but if you have Prime it’s free returns. Once you see how they fit you can learn more about your shape or post a fit check on r/ABraThatFits for assistance figuring it out.