Hi
Here in Bangkok, I contact a german guy called Robert Holnsteiner. He's a 300SL Gullwing specialist here and has worked on numerous classic Benzes here. I discovered him through a network of W113 owners here. He is also well recommended for other Classic SLs like the 190SL and other platforms like the 600 Pullman, as well as W111, 112s. Quite well known in the Classic MErcedes Club Thailand. He should be able to help you with all your restoration needs and coming to Thailand from Vietnam should be only about an hour flight. His email is sirholly@gmail.com and his mobile number is 66 8 1 891 7828
If you do have a chance to drop by Bangkok, let me know.