which alternator for saxo vtr 2000?

Hello, i'd appreciate it if somebody can please help me. I have a saxo vtr registered 15/5/00 (front headlamp and indicator all in one)mk 2/series 2 ?, it has a valeon alternator. The 2 nuts version. The sticker with spec is missing. The alternator works fine,but the bearing has gone on it making a whine/hum type noise. When i look on e bay they're listed as 96 to 2000 or 2000 onwards,and 2001 onwards, generally. With some types the difference is visible, some have a pulley wall,some are grooved which mine is,then some valeon have a 2 pin plug,which i think are the later models and then some have 2 nuts/bolts, like mine. My question is if it's a valeon 2 nuts/bolts type made in 2000 willl it be suitable for mine, i don't know when the cut off was in 2000 iethte change from one type to anothe. Thanks . iainr