Down Payment Assistance Help!!!

I just submitted an offer yesterday on my first home and I am a first time home buyer and the lender I am using saying I don't qualify for MHDC down payment assistance because my credit score is not at least 640 or higher and I would have to come up with the down payment myself. But my question is there any other down payment assistance program or grants with a credit score of 580 or higher I can apply for and if I got approved use that even if my lender doesn't offer it? And my loan is a FHA.