You should be able to find dextrose in just about any home brew supply store, and there's plenty of them out there. If you get over to this side of town I know the brew store on 99w in tigard sells it. You might check a Natures or Whole Foods too.
The solids and binder I have no idea, maybe try a local butcher. I've had luck getting odd cuts of meat from Voget Meats in hubbard, and I use them to butcher beef when I buy it. They seem to be pretty good about getting anything related to meat and they make their own sausage so they should know where to get some.
And curing salt, I'm sure they would have it too, or at least know where you could get it. I've had luck finding Morton's Tender Quick in both Fred Meyers and Haggens. In haggen it's with all the other salts and spices. Freddy's usually has it with their canning supplies.