Vic #301,
I recently moved from California to Florida and towed my J/30 cross country. I am just now getting it unloaded. I finally uncovered my spare alternators. I would be happy to sell you my spare alternator with the built-in regulator for what I paid for it plus shipping. It's a Hitachi Model LR135-105, P/N 128270-77200, 12 V, 35 A. If you are interested email me at jbingles@earthlink.net