5x7 Ish Pocket Fold Portrait In Pink Metallic

Hello ~ Can anyone help me?? I am making the invitations for my Aug wedding and I want to put them in a 5 X 7 portrait pocket fold envelope in a watermelon/azlaea pink metallic or would settle for plain but I can`t seem to find them under 1.75 per envelope ~ I love them but I am making them at home to try to keep the cost down! So $2 a piece is a little steep ~ I would need around 175-200 of them!!
Please Help & Thanks