I have a protein model and want to replace a 12-amino acids-long region within the center of the model with those of a PDB file containing a 12-amino acids long peptide of the same sequence. This peptide's PDB file was generated from X-ray diffraction data. I have read of restraint-guided molecular dynamics approaches that use such templates to achieve similar results. What I'm looking for are automated online servers for this kind of template-guided refinement.