Horatio Buck of Buckboards (somewhere in GA) use to do that as a business. I
don't know if he still does. I know he belongs to COA and I believe he's a
past president of the GA shell club. SO you should be able to get his
address, phone number etc. Wish I had more to tell you. Sorry if this is
considered promoting someone's business (providing he still does this kind of
work).
 
Frank Walker
Gems From The Sea
http://www.shellgems.com