Unfortunately for me, I don't know anyone who lives in Europe or wherever who could go looking for the discs.
I wouldn't mind trading with members of the forum to obtain what I need, but honestly, I don't think there is anything I could give them in exchange.
Which is why I never tried that approach.
The disc sleeve issue I actually solved quite easily, once I knew what to look for.
There's a coin collector store in the central city, so I just had to find the right size pocket and buy enough pages to accommodate my power disc collection.