I got mine from my local supermarket, but you can get one here (http://www.paskesz.com/chcandles.html) - scroll down to #4. That's what we use - the Safe-T Oil Menorah. The big trick is to use floating wicks and to not put in more than 1/2 inch of oil. Fill the rest with water. Put in more erev Shabbat, of course, so it burns for at least an hour after full dark.

Also, if your own chanukiah has big enough holders, you can buy oil cups and wicks *or* prefilled oil candles. These days, a lot of chanukiyot seem designed to hold either cups or the oil candles. We like the Safe-T one, though, because the oil cups are like little shot glasses (which can also be used as a chanukiyah - line them up with a new one each night and the shamash in a candle stick.) and are therefore more stable than the little oil cups balancing on stems.