Your best bet would be to post in the "want to buy" section of the exchange that you want a used set of scales in good condition for your model knife. You can also do an advanced search for sales threads containing your model knife and see if anyone is/was selling scales that didnt sell, you might be able to pick them up for less then they were asking, if they are still just sitting on them.
But keep in mind, you may ha e to pay for a membership to do this. I am not sure as I see the cost trivial compared to the community and wealth of information, the exchange doesn't hurt either.
Welcome aboard!