Found these at an LBS today:
I have been using the black walled ones in 27x1, 1-1/8, and 1-1/4, as well as 700C for years with decent results (wire bead). This 27x1-1/8 pair is the only ones I saw, but they were not there 2 months ago. The guy did not know when they came it, or if they could get more. Any Trek/Fisher dealer should have access to them though if you are looking for something a bit better than the std. $12-$15 Cheng Shen.