Does anyone have any clue where could i find it? I've been dying to get the BGMs from the second series T_T

It's never been released. Most shows done by Saban (who did this, Power Rangers, Kamen Rider, Big Bad Beetleborgs etc etc etc) used one big music archive they collected from all their shows, so Kamen Rider tracks would end up in Digimon, Digimon tracks would be used in Power Rangers episodes... it's a logistical nightmare. Ignoring the fact that there's an ungodly amount of material to piece together, the legal problems of all kinds of composers' music being jammed together for one release would be mind-melting. The only realistic option would be a deluxe release for The Movie, which was recycled pretty heavily for 02. Even that's a long shot though. Bug Music recently acquired the rights to Saban's music archive, but it looks like they aren't doing anything with it. If there's any hope of any of this music seeing the light of day, you should bug them (eh? Eh? See what I did there? Eh? Ah, I'm wasted on you people).

Somebody leaked a partial here: Thread 94117