Peter is right Tony.
Mine was lighting all the dash lights when I got it first. The local auto electrician shop in Naas rebuilt it for me.
Think it cost me about £100 at the time, that would be Punts, not Euro. This is the best bet.
I could loan you the spare one from Black Betty, but you would be better off putting the postage into a rebuild. As Peter says, the alternator is standard issue Japanese kit. When rebuilding, they can replace bearings which is a good thing. You could also do a search on the US Technical section. Some people [Aredubjay comes to mind] have had theirs rebuilt with more windings to pump out more amps.
Good idea in principle, but I have had absolutely NO problem with my stock standard rebuild over four years. For £100, good value fix I think. {Pumped up alternator would be useful if you were driving big stereo amplifiers all the time though}
Joe
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Black Betty [Bam a Lam!] '93 UK spec, still languishing
Betty
Jersey Girl Silver '92 UK [Channel Isles] 40K
Jersey Girl @ Mersea
Candy Purple Honda Blackbird
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White X2 RVR Mitsubishi 1800GDI.
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