Welcome back ketchup!!
Just to be 100% clear, you are looking for a course on coding best practices and not pentesting web applications, isn't?
I searched for this a little while ago and ended up buying a few books. There aren't many classes on the topic. There are about 20 things you can do while designing systems and coding that will prevent 99% of attacks. And really, once you start to systematically filter inputs and encode outputs, things are already looking very good.
I also gave classes to my co-workers (web app developers) about security best practices. What I found is that if they don't understand the vulnerabilities, they won't understand why they have to change the way they code. For example, telling them to use prepared statements to prevent SQL injection won't do much to them unless they can see, with their own eyes, how bad SQL injection can be.
So to me, the best option is for you who knows about security, to go through a book or two and teach your team how to code securely.
Otherwise, if this is not an option, OWASP has some members that offer courses. App Sec USA will be held in NYC on November 18-21. They offer many classes on the topic for half the price of a SANS course.
You can also look at CAST, they often offer training in US:
http://www.eccouncil.org/training/advanced_security_training/courses/cast-613.aspx Good luck!