Windows 8 software discs (Eamont Bridge CA10)

I'm dusting off a couple of old laptops and want to upgrade their operating systems. They were running Win 7 but I want to at least put 8 or 8.1 on them. Could put 10 on, as they're capable, but they'd run slow so the best choice is 8. Wondering if anyone has any original discs they're willing to part with, with product key info too, as there's no Microsoft support for these older versions of Windows anymore. I'll need a Linux-based one for the small netbook and a 32-bit standard Microsoft version for the standard-sized laptop. Appreciate any help offered!