Alternatively, you could piece it in with ebony and black epoxy or even just use blackened epoxy alone. Once you apply the finish you will have a really hard time telling where the Ebony ends and the epoxy begins.
Epoxy alone would absolutely be the easy way to keep it simple and might be your best bet.
Acraglas comes with black dye or you can harvest some lampblack from an acetylene torch.
Checkering can take some practice, but in that situation you would basically only be repointing existing checkering, which usually is somewhat easier. Filling in the gouges with the brown epoxy might be adding a wild card though, that would be a little overwhelming for you if you haven't had any experience.
Unfortunately if you farm it out, the cost usually exceeds the value so you almost have to do it yourself. It isn't rocket science but it can be time consuming and therefore $$$.
Checkering tools are fairly cheap. If you like woodworking you can practice on old discarded stocks till you get the feel for it, then proceed to the project. Lots of info online to help you get started.
Do make sure you're up to speed before you start in on the forend though, or it could get ugly.