Any of the big name 2-points will do, and that doesn't exclude the old classics such as brands you'd find at Cabelas. That said, mounting will be the real question.
You were right about the old saying, and trying to rest a bottom mounted sling across the chest just feels odd. As a rear stock mount (excluded a receiver plate) can be a pain, I find that running a front sling plate and traditional stud on the stock can actually sit quite well.
There are also a few great nylon stock adapters out there (VTAC, Specter, etc.) but they aren't available here. Have to get them sent from the states.