Reader needs help finding formula coupons

One of our readers has asked about where to find coupons for baby formula. Can you help her out with suggestions?

Here is Jen's e-mail:

"My friend and her husband have 6 month old twin girls. They were born premature and rely on Similac each day for the girls to gain strength and weight. It is extremely expensive for them. I have searched online to no avail to find coupons for Similac. They offer one coupon when you sign up on their website, but I haven't found any others. Please let me know if you know of any coupon sites, or ways to obtain the "Expert Care-- Neo Sure-- Infant Formula with Iron (13.1 oz). Thank you so much."

I suggested she contact her pediatrician's office as well as the OB's office. Do they have formula coupons?