Thanks for all the suggestions. I love the ookworks stuff but it sounds like he may be having some business issues.
I just had John at BPWD sew 18" of noseeum mesh around the bottom of my SL3 and he also made a 2 man solid inner for colder weather that fits inside nicely. I'm using polycro for the floor now and just bought some tyvek here on the forum, but was really hoping to find a used floor at a descent price. Then I'll have a pretty modular 4 season set up.