Christopher Enterprises released Michael Kaluta's Dante's Inferno portfolio in 1975. It featured 8 full color plates in an illustrated folder and was limited to 2000 signed and numbered copies. You still see copies of it for sale at what I consider pretty reasonable prices.
The Gate of Hell
Charon
Dis, Styx, and Dame Fortune
Paolo and Francesca
Furies and Tombs of the Heretics
Nessus on the Shore of Phlegethon
Geryon
Roosting Demons