Have you heard of "The Eternal Castle"?

Hey everyone. I am new here but hopefully you can help me. There is this game called The Eternal Castle and I'm desperately trying to get it to work. So far I am able to play only the beginning, the part where you land in the planet and search for the AI, but then the game asks me for Disk 2. I've been trying to find this game but I can't see it anywhere else and I'm starting to freak out. Does anyone know where else I can find this please??
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Yeah, you found the first disk, it's awesome!!!
I remember my cousin playing it all the days lot of years ago
I always wanted to play it but I never had a copy of it
I thought it can't be played again before to see the screenshots so if you find also the other disk please let me know :)