Hi,
I have discovered that I can easily press the wire into the wax foundation by using the tip of my light duty hot glue gun. I just set the frame down over a piece of card board for support, and a sheet of foundation and I then run the perfectly heated tip of my light duty glue gun along the wire. It works great. The tip of my glue gun even has a little notch in it for the wire to sit in. Not a solution if you had to do hundreds of frames but for 10's it beats having to build one of those electrical things and works far better that the spur tool.
Cheers,
Patrick