Premodern Japanese Texts and Translations by Michael Watson
(Meiji Gakuin University)
Edited and individually maintained by Michael Watson, Faculty of International Studies, Meiji Gakuin University, this website contains bibliographic information for English translations regarding Japanese literature up to A.D. 1600 which is provided according to A to Z index for titles, some of which include further information such as links to JSTOR or Amazon.
日本文学翻訳作品データベース（国際交流基金）
Japanese Literature in Translation Search Although primarily focusing on works after WWII, this database for bibliographies is compiled by the Japan Foundation in collaboration with the Japan P.E.N. Club for Japanese literature which is translated into other languages.
Overseas HEIAN literature Information is the database to disseminate the results of collaboration among researchers around the globe, including 「海外平安文学研究ジャーナル」. The above link directs visitors to the page with diversified surviving manuscripts of "Genji Monogatari" for your reference.