I'm pretty sure "hero" in this context just means you. Not something you obtain. Something you are by default as it's you, the player. According to the page, you buy them from the merchants in Novac or the Crimson Caravan. Or you can craft them by getting the schematics in the Crimson Caravan.
Though, if you see weapons on the list that aren't in your game, then it's probably because you're using the public version and not the member version. To get that version, you need to be more active in the community until they grant you access.
For future reference, if you have a question about a mod on this site, it's best to ask your question on its page.