That would really be nice to get PC 98 touhou cosplayers. They are rare to find at cons all I saw this year is a Mima at Sakura Con and a Kotohime at Anime Expo.
Sakura Con 2014 April 18-20 (confirmed)/PC-98 Meira/Eirin Yagokoro/Formal Rinnosuke
Anime Expo 2014 July 3-6 (confirmed)/PC-98 Meira/Eirin Yagokoro/Rinnosuke (last day)
Anime Weekend Atlanta 2014 September 26-28 (maybe)/PC-98 Meira/Eirin Yagokoro (maybe)