Cheap generic keyboard / TKL covers for MX?

Learning and discussion
1

I’ve got an Orange TKL keyboard cover finally, and it’s great. Another brand on the way as well.

For the more generic factory keyboards that didn’t ship with a cover, is there something commonly available from Amazon or big box stores? I’ve got a household Varmilo here that didn’t ship with a plastic cover.

I know Amazon has all those silicone protectors and stuff, but I’m just looking for a cheap plastic cover you put on the keyboard when you’re not using it - better if it’s known to fit Varmilo or similar major MX prebuilts.

2

This fits full sized; so maybe a TKL + mouse underneath?

full sized cover

3

I feel like someone could clean up in this hobby selling vacuum formed covers for various boards.