fender recomendation

[75chev4x4]

Hey guys wanted some advice on fenders for my 75 k20. The rust is getting the better of the two front fenders and I wanted to get a set to have for when I decide to fix the rust on the whole truck and get it repainted. Would it be best to look for good used gm fenders at the junkyard or does anyone make a decent aftermarket that fits well (prob not but I thought I would ask). Besides that I guess fixing my current ones or paying some $ for the nos gm ones is the only other option.