I'm just finishing grafting the whole rear off a donar car.. Along with my frame rails being bad, my spare tire well was rotten, and one rear spring perch, so I just found a good donor car, a 4 door no less, and transplanted the whole thing,, from the seam in front of the well, then split it at the bottom of the fenders, sawed under tailites, and small cut each side of lower trunk opening,,
You may want to see if that a better option for you,, and my donor car cost $100.. hope it helps, I'll post some pix.. grant