In article 8,
Frank wrote:

Thanks, but I have been to the major sources, like google, ebay and major
aircraft suppliers. I was hoping for some one with a secret stash or
supplier. I need 2 good magnets, rebuildable cores or new or used mags for
an O320. AD's don't you know.

Frank:

The SF-4s area very heavy mag and still have the old bee's wax coils,
which are susceptible to moisture, although they can be baked dry and
recoated with wax.

I have to use SF-6s, which are pretty reliable, but over the years, I
have seen both coil and condenser degradation. If I had a choice, I
would like to go with something more modern.