I am finding no Virtual ALC courses for your described MOS of Small Arms Repair/Artillery Repairer. In fact, all I am finding is one phase only which is Resident Course and only 3-5 seats per listed class (FY pending). You will more than likely have to sit down with your Training NCO/ATRRS Operator.

I know that Phase 1 ALC is Distance Learning. I'm not sure if the Army is offering a virtual Phase 2. I can check tomorrow when I get into my office.