I purchased it from the vet but I believe it is available in the stores. It was $9.30 for an 8 oz bottle.
What it says on the bottle is:
Virbac Animal Health (brand)
Epi-Otic
Ear Cleanser for dogs, cats, puppies, and kittens
Cleansing, Drying, Non-Irritating
I'm sure any ear cleaner that says it is drying will be as effective.
Here's a link that has the 8 oz for $6.50.
http://www.petvetdirect.com/home.asp?searchstr=Epi-Otic