Check locally especially craigslist. Online places like Stromberg's chicken have quail eggs and sell runs up to 1000(depending on breed). Here is their site
http://www.strombergschickens.com/prod_detail_list/Fertile-Hatching-Eggs . You can also check Ebay as it normally has quail eggs. Just know that it's a hit or miss with ebay. Check the person's feedback to see if any complaints or praises on the eggs they have sold. I actually have a batch in now from ebay this is my first quail batch.
I would personally check around byc for sale area. I believe there is a section for hatching eggs. At least eggs coming from members on here you should have a sense of what is coming to you.
I hope this might give you some ideas and I'm sure some of the other members might chime in with some more ideas.