Hi Timothy,
I am currently researching the units, operations and pilots who flew the Fw 190 in the Mediterranean, May 1943 - July 1944 together with my research partner Andrew Arthy. That includes attacks made by Fw 190 fighter-bombers of 6./SKG 10 on USS Savannah around the period in question.
I can recommend a good researcher at the Freiburg archive. His name is Sebastian Remus and you can contact him at remusresearch @ aol.com (remove the spaces around @). He charges 25 euro pr. hour, but he is effective and knows the archive very well.
You can also contact the archive directly, but I do not think that would help you as they would probably just hand you a list of free-lance researchers, such as Sebastian Remus.
Bundesarchiv-Militararchiv Freiburg
Postfach
D- 79024
Freiburg i. Br.
Germany
There is also a bundesarchiv web site:
http://www.bundesarchiv.de
You are welcome to contact me via email if you have further questions.
I hope this helps a little.
Kind regards,
Morten