According to my local Cooperative Extension Educator and based on the images reviewed, this was not a borer that is typically identified in our county. I sent him the same images and he did not have an idea which borer it was attacking the Royal Gem Crabapple.
So if you readers have seen this before, please leave a comment. My tree needs your help, even though it is unlikely the insect can be controlled. I did consider lilac and dogwood borers since they are in proximity, but remain unaffected. In addition, they were not described as having damage of this sort.