Store Locator Software suggestions?

[johnnygphotography]

Hi Folks,

I'm searching for a store locator software to use on this site I'm designing for this company that sells T-Shirts and has hundreds of retail stores all over the country carrying their tees. I Google searched and results are all over the place in terms of software prices - from hundreds of dollars to free. So it confused me.

I am looking for a software that is free/affordable and page simplicity would be great - type in the zip code and it populates the results on the same page (without it having to go to a different site and page for results).

I'm skilled mostly in HTML and Flash so experience with databases/php/asp is minimal (I'm a quick learner though and need to learn PHP soon anyways).

Any suggestions? Thanks again!