You would be surprised how giving most compianies are if you write them a letter. Will Nintendo send everyone on this mesage board a DS if we write them a letter, no, of course not. But, if you write them a letter, and I mean a pen and paper letter, you might be surprised at the responce. A classmate did this when I was in highschool for a class project, just writing to various companies of products he used. There was a 95% responce rate from them and in most cases they included coupons for free products.
I did it a few years later, as a joke, writing to Slim Jim (beef jerky company for those who don't know) asking about the ingrediants of thier product. They sent a reply that was clearly a responce directly to me as it answered each of my questions quite specifically, and included a coupon for a free canister of thier product.
Give it a try some time.