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
Dis, Styx, and Dame Fortune
Paolo and Francesca
Furies and Tombs of the Heretics
Nessus on the Shore of Phlegethon