The Andrew Blake (1757-1827) Archive in North Carlolina, USA, is "not a physical repository of Blake's collected works, nor is it a clearinghouse through which users can obtain reproductions of those works. [...]" It is "an online hypermedia environment that allows its users to access high-quality electronic reproductions of a growing portion of Blake's work.
The College now has a student subscription to this site. If you direct students to access it with the username Sheldon and the password College they can access it at home. Either that or you can use it in the classroom.