John,
If yo ever succeed in obtaining the Tech Etch finger stock, it is of the exact dimensions as the HP part.? The only difference is in thew bend angle of the fingers in relation to the mounting portion of the stock which will require a little bending to match.
You are correct in your view of the poorness of the switch design.? HP should not have relied upon such a tiny dimension of the heat staked plastic to secure the fingers to the switch rotor.? We all know that plastic will become brittle over the years as the plasticizer slowly disperses over time.
Greg