Where to buy Sapele for marine use? Need it for port light trim and coaming on a sailboat

Working on a 36' sloop. Need about 60 BF of 4/4 and 30 BF of 8/4 sapele for exterior marine work, port light surrounds, companionway drop boards, cockpit coaming cap. Needs to be straight grain, heartwood only, preferably quarter-sawn for stability. Where do people buy small quantities of high-quality sapele for boats?