Disks for home planetarium

What company do you buy disks for planetarium and where? I want to buy them for my son. I only found used wheels. But I don't want to take them. Suddenly they stop working quickly. Where to buy new ones?

Used drives take a big risk. It could be money thrown to the wind. I only take new discs. You can easily find them in online stores. High quality discs are from sega classic discs https://astronomix.info/planetarium-discs.html Many different options are presented on the site. There are many discounts