the fastners are the harder part on the DB.... they are an odd size. BUT you can buy FRAG grips from monkey edge... or gunner grips if you can find em! both are bad to the bone...
or adding scales is always an option, either making them yourself or having them someone make them. g10 is so easy to work its funny!
I'm completely ignorant of how scales are attached to a knife. I looked through some of the materials on Knifekits but didn't gain an understanding. I've made my own Micarta and wouldn't have any concerns about buying the material and getting it shaped, I just don't know how to attach it to the knife. I don't want to epoxy it in place, that's a bit too permanent for me.