http://us.itselectric.ca/DNP_Freewhe...eed_11-28t.htm

Here's a couple more: http://www.nycewheels.com/freewheels.html

So, indeed they do exist, despite the common categorical statement that they don't. At one time I had three. But I am switching everything to cassette. I couldn't tell you about a wholesale source because owning 7 bikes doesn't quite qualify me as a bike shop. I didn't have much trouble with the 11t ring, but there are those out there who will torque on them with stronger legs than mine, I'm sure.

Don in Austin