eddb says Ogmar, Ratraii, Deriso are worth trying for DSS
https://eddb.io/station (you can also find most modules grade B if you try)
There is a new scanning system, but it's easy not to notice if you're travelling in systems people have already explored and sold the data for. Check youtube for instructions on the FSS (full spectrum system scanner, yes that's one more S than the abbreviation), e.g. Obsidian Ant
https://www.youtube.com/watch?v=_A8HvjEidNA
If you hit a previously unexplored system then your system map will be blank, you have to do a discovery scanner honk and then you can identify the bodies using the FSS minigame, or fly towards them in the usual way (I'm not sure if they're available as unexplored targets in the nav panel, though, so avoiding the FSS may require looking for bodies by parallax). If the system was explored by someone else then your system map will show all bodies (at least, of the stuff they scanned) the same way it used to, with the minor change that you don't need to honk to get that anymore.