Well this is a first.. A quarter panel only gets replaced when damaged badly beyond re-work possibilities. Your car is Jerez, and since it is such small issue (as you claim) you can have it repaired and repainted. Blending will NOT be necessary. Replacing a quarter panel is not an option, but if you take it to a shop and tell them that's what you want, they will gladly take your money and I can guarantee you that you will not be happy once done.
Have a reputable shop do the work, the only problem I foresee for you is making that black show not one imperfection from a refinish. It's tough, time consuming, but definitely possible.
My source: Father owns a body shop, and I paint as well.
You need anymore info regarding repairs, I'd be glad to help, just send me a pm. Best of luck.