Book one / edited, with introduction, by Carol V. Kaske
Book two / edited, with introduction by Erik Gray
Book three and four / edited, with introduction by Dorothy Stephens
Book five / edited, with introduction, by Abraham Stoll
Book six and the Mutabilitie cantos / edited by Andrew Hadfield and Abraham Stoll ; introduction by Andrew Hadfield.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
The faerie queene by Edmund Spenser. ISBN 9780872208919. Published by Hackett in 2006. Publication and catalogue information, links to buy online and reader comments.
