Parts of several editions of the poem are freely available in Google books. There is vol. 1 of Méon’s 1819 edition; vol. 1 of Michel’s 1864 edition; vol. 3 of the edition of Langlois from 1921 as well as his Origines et sources du Roman de la Rose; vol. 3 of Dufresnoy and Damerey’s 1799 edition; and vol. 5 of the 1880 edition of Croissandeau. There is also a transcription of Hunter 409 in Max Kaluza’s 1891 publication. And finally, Francis William Bourdillon’s book on The early editions of the Roman de la Rose is available in full.