First, you want your surround sound twitters to be about 2 feet above your ears.
Second, you have following options:
1. straight set w/loveseat - IOIOOIOI - 118" wide
2. curved set with the loveseat - IOVOOVOI - 126.75" wide
3. straight set with outside chars angled in IOVOIOVOI - 129" wide
4. curved set with wedges in between in IOVOVOVOI - 134.75" wide
They all fit you your space, and while THX requirements for each seat is to be at least 2-3 feet away from any wall, with home theaters it is not always feasible, so you would choose a configuration that would work best for you.
With the sets that have a loveseat you can always get a portable removable armrest that will allow you to have a "separator" and a place to rest your elbow on the loveseat when needed.
In term of availability, I would need to know the configuration, color and cover you were looking for, and then I can check the inventory, and let you know.
Ultimate Home Entertainment