Get it on Amazon on CD no problem at all along with all the rest of his work - Oxygene was the first, then Equinox (bought out when I was about 12 years old), Magnetic Fields (brilliant) then not so certain of exact order but roughly, Concerts In China, Concert In Houston...Zoolook (an acquired taste), Rendevouz, Revolution, Waiting For Cousteau, Chronologie, Oxygene 7-13 (brilliant), Concert In Hong Kong, Concert In Lyon, Metamorphoses and finally Aero
There are some odd ball albums which are club/rave re-mixes and personally I dont go for these