Those parts could easily be 3D printed. I didn't download the file to check the dimensions because you have to register but my guess at the cost would be around $30-40 for basic plastic using an on-line print service. If you plan on using the tool multiple times you might want to print in a sturdier material, but basic plastic (PLA) should be good enough for at least one or two uses.
I would suggest hitting up FormTA's son and pay him to print it for you.