I would be glad to exchange findings. It's been several months since I left my research on Ferguson/Beauregard to start another project (24th NC Infantry/ 36th NC Artillery).
My gggrandfather was a Corporal in Ferguson's/Beauregard's Battery. He entered service in March 1862, was captured in April 1865 at Salisbury, NC and imprisoned at Chase Prison Camp, OH. He was my interest and I wrote a brief "history" of his war experiences, largely based on his Service Records (from Fold3.com). You might find that of interest. The bibliography could be of benefit.
Sorry, I do not have casualty records. I did start building a Excel spreadsheet of each soldier who served in Ferguson/Beauregard Battery, but stopped after the C's. I do plan on going back to that at some point. There is another resource I recently found that may yield some casualty data. I'll check and let you know.
Send your e-mail address to firstname.lastname@example.org and we can discuss further. What is your interest in Ferguson/Beauregard?