I've started sleeping upstairs to see if they have any interest at all in cuddling up. Last night I slept in the back bedroom and they slept on the bed in the middle guest room. So I'll try the middle guest room to see if they are willing to share "their" bed with me.
If they do, I may post them for adoption, although I expect it will be many months before the perfect home appears. It would need to be local, have no other cats (Pepper is a bit of a bully with the other cats here although he might settle down once there are fewer kittens who run around begging to be chased), and be a perfectly secure house. We've had people with somewhat cluttered homes and open basements be perfectly good homes with friendly cats, but these two have already shown that they aren't a fit for a home with too many places they can hide. They need a nice quiet place with a cat lover who will take security seriously, and keep them shut up in a single room until they are quite comfortable, as you can see they are here.
I also need to get them more used to having treats thrown their way. When I toss treats to the general cat mob, Pepper runs away, as if he thinks the treats are being thrown AT him rather than FOR him. I think we can work at this with them together upstairs, where they are most at ease. I'd like to get them used to treats, so they can mingle at treat time with my pet cats. It's always good to have "tasty treats" associated with "being around other cats."