There are several characters here, at Renderosity, that are well-done, aged, characters. These would use custom morphs and bump maps/displacement maps/normal maps, of course. (Example) https://www.renderosity.com/mod/bcs/old-lady-maja-for-v4/80417

You can also find a few free ones on ShareCG: (Example) http://www.sharecg.com/v/55473/related/11/Poser/Old-Lady-Face-Moprh-For-V4