The senior author of this study practices in Iran and uses amnion (placental lining) grafts for vaginoplasty, the harvesting and cultivation of autologous fibroblasts seems to improve patency. I wasn't especially impressed with the aesthetics I saw in the paper, and IAC doubt any western surgeons will be trying this out.
Interesting work, placental grafts aren't a new thing, I don't know how widely they're used.