Parts available in this region

Anyone know of a place to find parts for a duster in the KS, Nebraska, Colorado or Oklahoma area. I am in need of a passenger side fender for a 73 Duster and some other misc. parts. Would like to find something close to my area, NW Kansas, but would consider anything in surrounding states to save freight or to come and see it. I get to Salina and Manhattan Ks pretty often. Anybody got any ideas?