Hi James
I live in South Carolina-there is no actual Sunbeam club in Atlanta but there are many Sunbeam owners who live there and are pretty active attending local British car shows and national events run by TE/AE and other clubs. There will be a good Sunbeam turnout at the British car show held in Rome, GA the first weekend in May. If you can make it there you can connect with many local owners. Are you a TE/AE member?
Later this Fall we will have a Sunbeam gathering in conjunction with a British car show in Columbia, South Carolina. Come join us! Eric