I found a great place for gears that's got exactly what you're looking for. Here's a link to their page. They have one of the best menu driven selection processes I've seen at online stores. You just select by your shaft diameter (1.5mm) and whatever other parameter you need and you'll end up with the exact thing you want. Quick delivery to. They helped me out on my project and I'll definitely use them again. http://www.sdp-si.com/eStore/CoverPg/Gears.htm
That's the page to select the type of gear you want, not the home page. You'll probably want one of the top two categories, most likely 'gears' but you might want to look at 'timing belts,pulleys,sprockets and chain drives' as well. Anyway, they've probably got what you want.
That's a great vendor to have a link to - thanks for posting it.
One thing I noticed though (and I've seen this at other places supplying gears): Why is it that you can't seem to buy a "compound" gear; that is, a spur gear with a "hub" that is a smaller (pinion) gear (metal or plastic)? It seems you can get spur gears of all sorts, and you can get pinion gears, but you can't buy both as a single gear. Yet, many mechanical products out there have such parts included.
For instance - I had a surplus Pittman gearmotor (paid $10.00 for) that I busted one of the internal "compound" gears via an "overdrive" situation; I contacted the company that currently manufactures the brand, and they would only sell me such a gear for $7.00 - but I had to buy 50 pieces! I said no-thank-you to that, but where could I get such a gear in the future (in the end, I swapped the gear for another from a different Pittman motor I had)?