This guy made metcn, an unauthorized met-art-clone with chinese girls:
http://metcn.com/new.html
There is potential, to me the chinese girls look in average more cute than japanese ones.
About "porn", there is amateur one going around boards, but these are constantly blacklisten (IP, dns) by the chinese great (fire)wall, so they change ip and domain name constantly, also require invite id's (it's like a referral system), which make it quite boring for a western to follow.. need to keep updated on new ip's weekly, make login and get credits by refer a few other guys or pay few cents with chinese-only pay systems.