Does anyone know of any Prenatal Vitamins that have at least 1000 mcg of Folic Acid?

I'm trying to find some that are over the counter, and all I have found have 800 mcg of folic acid. My Dr. gave me some free trial one's that had 1000 mcg's, and said that the main thing when getting PV's is to look for the 1000 mcg's of Folic Acid. Thanks for your answers!