とらのあな:
http://www.toranoana.jp/cgi-bin/R2/d_search.cgi?bl_fg=0&item_kind=0402&mak=eb&img=1&stk=1&makAg=1&p1=&p2=&p3=

同人堂:
http://web.doujindou.com/seek/?word=eb

matchi:
http://shop.matchingworld.asia/index/search/q/EB/

mandarake：
https://order.mandarake.co.jp/order/listPage/serchKeyWord?categoryCode=03&keyword=EB

Melonbooks:
https://www.melonbooks.co.jp/circle/index.php?circle_id=24358