Need some doors

[GKPremier]

I have a 2001 2500 extended cab. I have some rust that has gotten bad over this last winter at the bottom of my driver and passenger doors. I want to find some new outer shells/skins so i can completely get rid of the rust. Every company/junkyard i have talked to hasnt given me a price below $800 per door. Anyone have any ideas where i can find some doors?? I need to replace them before this coming winter