Re: 12AU7"s Antique Electronic Supply in Tempe, AZ has 12AU7A's for $5.50 each. Seems pretty steep price but not if you have equipment down. Their phone # is (602) 820-5411. Quite a decent place to do business with, if you can stand their prices. They have a very good stock of old tubes, mostly as result of buying out dealers, etc. Ed Phillips