Alternator/Voltage Regulator Problem???

[HaagIII]

I had my bonehead move of the day on Mon. My glow plug relay has been out since I aqcuired the car, so there is a lead coming from the battery to bypass the relay to turn the glow plugs on with a momentary switch. My problem started when the switch broke and I used a jumper wire to turn the glow plugs on. I forgot to unplug the jumper wire and drove home most of the way (approx 25 miles). Once I noticed the lights dimming, I realized what I did. I unplugged the wire and the lights were now brighter again. I restarted the car later that night with no issues and then the next morning. But the next day at work I could barely turn it over. I jumped the car and got it to start. On the safe side I turned on all the lights and let her warm up. Slowly the lights dimmed. All signs point to alternator. My question is, is it just the regulator that I fried, or is there something else in there that I took out? Is there a way of checking this or do I just replace the alternator. Do they make rebuild kits that would fix this. The alternator was replaced within the last year by the previous owner.