First off this is a great post!! I have been searching for a way to create runes of my own as well. I am going to attempt to make my own using air dry clay or the clay used in ceramics, I forgot its proper name. I haate the clay that you can bake its horrible, it does not last a long time at all. I would suggest using air dry clay, and If you can try to get someone to describe the symbol braille the names, and edge the symbols into the clay that what I want to try.
The other thought I had was to use a raised line drawing kit, make the symbols, and use paper to tag the bag I keep the runes in.
What do you all think?