As someone else mentioned, just send a signed copy of your C&R FFL to Brownells with cover-letter stating that you would like your FFL to be on file and would like a copy of their latest catalog. I made up a form letter and sent it to about 2 dozen places. About a week or so later, I got a Brownell's catalog and a letter stating that I was eligible for the FFL discount. Then, at the Brownell's website, I logged in an account and put in my FFL number. Now, when I browse the site the lower "discount" prices appear. I love that store, as it is close to Minnesota and I get very timely delivery.
As for the C&R FFL, those of you interested should go to this link, it tells you all you need to know. It took 3 weeks to get mine.
http://www.cruffler.com/whatis.html
edit: if you get a C&R license, check out all the vendor links in the C&R forum here on AR15.com