A whole door 4 a zenki s14?

[Hawd]

I've been looking for a s14 around Los Angeles area for about 5 months now. Been looking for good deals and people seem to get to the deals before me . Well theres a zenki s14 for sale from a dealership for 3,000. There is said to be driver side fender and door damage. Tommrow I am going to go see how bad the damage is and if it is worth to buy or not. I just want to know how hard would it be to find a whole door for the 240? Can i buy a while one from a nissan dealer? Are there any websites where I can get a whole door? I'm not concerned about the fender because i am going to to do a s15 conversion. Thanks.