Again, not looking at the checkbook, could it be even better to get the innards of a Vectron, and replace the traction motors?

I am aware of one historic vehicle (an EMU) where the complete traction equipment from a (at the time) current EMU was used.

In another case, they were apparently in talks with Bombardier for a 4-system TRAXX equipment to put into another historic train. However, they eventually decided to do a "soft" renovation, and stayed with the original concepts.

Back to the GG1, the question is, of course, how high the power rating actually should be; it may not be necessary to recreate the original rating, but somewhat lower could do as well. This could mean that only 4 axles would be driven (which would, in the case of salvaging the equipment of an AEM-7 make things way easier).