In terms of an exact replacement of finishes, materials or architectural elements, it is understood that the Historic Preservation Commission would prefer an applicant to maintain, stabilize and repair the original or existing finishes, materials, or architectural elements before considering the replacement of same. However, should the original or existing finishes, materials or architectural elements be of such a deteriorated condition as to require replacement, the new finishes, materials or architectural elements should be designed and installed to replicate the material, color, size, contour, configuration and design of that which is being replaced, provided that such materials are available at a reasonable cost.