replacement rear bed fender

so yay a while back my brother backed into my truck and i need to replace the stepside fender on the left side of my truck. my mom wants to get it professionally done but i took it to the ford dealer and they gave me an estimate of 1250 to replace the fiberglass fender. i was talkin to james and baha a while back and they suggest just replacing it myself which shouldnt be too hard, i was just wonderin does anyone know a good place to just get the left stepside fender from, i saw a site online a while back who sold em for about 500 or so, which is under the 550 that ford lists the part as but i dont remember where it was so just wondering where could i find one

it isnt that hard tp pull off
theyre bolted on so if you gotta rachet you oughtta be able to get it off

i know how to get it off, just wonderin where to get a replacement stepside, they are few and hella far between at junk yards