Additional hooks for BAKflip tonneau cover

Cargo bed noob here. Looking for some additional clips/hooks that are compatible with the ledge/rail system for the BAKflip tonneau. I ended up putting cargo into the cab because it slides around. I understand I could get a rubber mat for the bed, but I do get some water in the bed due to some pieces of the crease seals breaking off, and don't want the rubber mat to get moldy underneath. I inherited my 2013 and there just so happen to be 2 little snubby hooks drilled into the tonneau rail but a little past mid bed closer to the cab, and two D rings attached under the middle part of the cover. I'm a short guy at 5'8 so rigging the cargo net there wouldn't be easy to load and I'd prefer it closer to the tailgate. I'm not even sure if those hooks were included with the BAKflip or not, or where to get more like them. I would like bigger hooks though anyway. The cargo nets I'm considering require 4 attach points, so having two won't help. Even D-Rings would be helpful.