'05 passenger side mirror

Hi, new here but have read threads before. Seems like a good site to get some answers. I have an '05 F150 that needs a new passenger side mirror. I need the whole set up. I have already bought one but the mirror on it is curved and it's driving me nuts. The factory mirror that is still on the driver side is completely flat and that's what I want for the passenger side. I have searched online but everything I seem to find has a curved mirror. I am sending this one back but need to find another one asap so I have all of my mirrors. Does anyone have an idea as to where I can find this? Any help would be appreciated. Thanks