C.S.
A few suggestions: ask at your pediatrician's office and at your OB office if they have any coupons or samples. Ask at Mommy groups or at your daycare if you have one if anyone has Enfamil coupons that you could have - perhaps in return for Similac coupons or whatever. My mommy and me group had a weekly coupon "exchange" over a park playdate. My daycare has a bulletin board to pin "coupons that need a home" to...
Also, post a wanted on freecycle and also look on craigs list to see if any are being given away.
I got the coupons also but I gave them all away as I was nursing - do you have any friends who are nursing but getting the coupons who will give them to you?
Good luck!