Thrift stores usually have a crappy poker chip set or two, or you can look for a copy of Sequence - only three colors, though. Dollar Store is a good bet (hah - pun!), too. How many colors and how many chips you need? I can bring some to Protospiel.
Bob H. replied:
How many different colors? If just three you ca get the red white and blue ones from Walmart or other similar store. If you need more colors try Gamemaster on Hwy 100 or Master Zs in Waukesha. Both shops carry poker supplies and may have what you are looking for.