EXT-120 Manufactured by AZCO?

Hello Ozoneman, I hope you can help me out here... I noticed there is a lot of talk that the POG system by AZCO is identical to the EXT-50 system by Longevity. I was wondering if AZCO also manufactures the system that Longevity uses for its EXT-120 system? If so, which model is it? How do I purchase it? I would like to purchase the AZCO version rather than the Longevity version since the AZCO is a lot cheaper. Thanks. AZCO is in the process of rebuilding a new website so their isn't much info on there. Tweet