You can do your own:

https://github.com/MyEtherWallet/MyEtherWallet or https://github.com/MichaelMure/WalletGenerator.net

Recently there has been an influx of scam attacks using forged myetherwallet URLs in all the altcoin slack channels. Using your own is really the better way to go about this.

The article mentions ways to run both solutions offline but going to the source is probably the safest way.

You download and unzip files from those websites and then run them with the Internet turned off. You can inspect the source code to make sure it's ok. This article is targeted at non-technical users so a solution that relies on downloaded software is good enough. If you'd like a better solution, then I'm sure some research would serve you well.