Looking through the electrical section of a mail-order catalog I came upon the foolowing two items:

1. Replacement breakers for Federal Pacific, made by Unique Breakers, Inc., $16.12 ea. for 1-pole 15 or 20A version.

2. Replacement breakers for Zinsco, "Q" series made by Challenger, $19.12 ea. for 1-pole 15/20A.

Bearing in mind the high prices, does anyone buy this type of thing to re-fit an old FP/Zinsco panel, or are they strictly for the homeowner market only?