Hi Lynn:
I have made these blanks and my method was a time-consuming, inexact, trial and error, PITA!
I started by sanding the back sides of printed circuit boards until they were about the thickness of aluminum foil, cutting them to tube sizs with Lineman's sissors , epoxying them around a pen tube, and finally, casting in clear PR resin under 40 PSI. I chose to use the bigger Wall Street pens, simply because these sets left the most "meat" on the blank.
Even using the WS component sets, I still managed to cut through the PR and into the components, which required resealing the blank with CA.
You may want to fire off a PM to Bruce119,
as he did make them for sale, long ago. I'm sure there MUST BE A BETTER METHOD THAN MINE, as it was messy, VERY time-consuming and usually "hit or miss".
After many efforts at making these, my best course of action was to buy the Tiwian blanks on sale for $15.
Respectfully submitted.