I figured this out, well in theory anyway. This is an excellent FJ40
website and it has a section on rebuilding the alternator. To get the brushes out, I would put the soldering iron on the back side of the brushes to melt the solder holding the copper wire that is attached to the brushes. The procedure is well documented and there are pictures on the web site.
But as I was cruising the net, I found that a rebuilt 45 amp starter with a lifetime warranty could be purchased for $31 at Checker. The part number is 14153. It tagged as made in Japan and rebuilt in Malaysia. The case and band look just like the original, only the band is painted black.
Good luck must have been shining on me as there was one on the shelf. I installed it along with a new belt and my electrical system is working like a charm. My ham radio reports the voltage at the battery and it reports in the 13 volt range at idle and high 14 to low 15 at high rpm. Prior to replacing the alternator, my highest reading was 12.7 volts.