LED Signals + Resistors

So just got my full round of Rizoma Track 01 signals mounted up (which are LED). As I suspected, it looks like I'll need some resistors to make them flash properly. I could've got them with the rest of my Rizoma order, but didn't at the time (hindsight). Anyways, is there something generic that I can get for this? I'd get the Rizoma resistors, but the nearest distributor is in another country and would prefer not to wait another 10 days and pay a bunch more money for shipping. I'd imagine theres gotta be something generic that I could pick up at an electrical supply or something, I'm just not the sharpest with electrical and need to know the details. Any thoughts are appreciated.