I got my job postings done and dove right back into research and testing on Linux Network Bridges. While I was able to successfully create a netowrk bridge that behaved as expected and had a properly cloned MAC address, it was predicated on changing a system file parameter. This is not good practice and would be reverted in the event of a system update that touched that specific file, so I spent the majority of my day researching other ways to do this fix, and so far my testing has not resulted in success. I will continue tomorrow!