Not sure what your price range is, but you can use the search funtion at the beginning of the page and type in "el34" and that will show you a few amps that use el34 tubes.
Quicksilver uses el34 tubes, but not sure if you are interested in those.
There are also a pair of Wolcott monoblocks ( 5k )for sale that use el-34's.....
What speakers do you plan on using ?
