Yes, there were actually three albums released related to the film:
Image Album (32ATC-105)
Original Soundtrack (TKCA-70799)
Symphonic Suite (TKCA-70800)
Not one of my personal favorites, but Hisaishi is always good
These are some of his oldest releases, they are pretty easy to get a hold of though. A lot of his older works were reissued two and three times since the original release. Usually there is a 32ATC-*/30ATC-* and TKCA version. Arion also came in a box called "Winds and Seeds" that contains the original soundtrack and symphonic versions of Nausicaa, Laputa and Arion. It's a beautiful box set should you ever have the opportunity to get one.
You can usually get these on Yahoo! Japan for around 30$ each.