Switch stands and signals can be bulk replaced if they exist in the route, but missing dependencies cannot. There's something in the works, mentioned recently by Tony I think, that said they're working on a way to replace missing asset references with an actual asset. This would mean knowing what the asset is, plugging in the KUID, then doing the replace asset thing.
Unfortunately, his stuff is gone. I think the issue was caused by pirates and illegal distribution of his content. It's too bad it had to go that way.