amplifiers juicedlink DS214

What type of audio adaptor would work if all my mics and cameras have a 3.5 connector? I definitely needs some sort of audio amplifier because the audio is too low on my cameras. The cameras I am currently using are Kodak zi10 and an Aiptek hd z7. I know they are not great cameras, but I am looking at the Canon Vixia HF G20 so hopefully this will help with the audio. I think I should still get an amplifier of some sort no matter what camera I end up using. The wireless microphone I am using is the Audio Technica Pro 88w/r. i have been told about the Juicedlink DS214 but it looks like it is not made anymore and i cant find a used one. Does anyone have one they want to sell or does anyone no a comparible item?