The freewheel listed on that link is an 11-30, though I vaguely remember that there is a 7 speed 11-32 available somewhere. Also noticed that they sell 8, and even 9 speed freewheels in the 11-32 range. That's amazing to find those as Shimano discontinued making freewheels with an 11 tooth in the cog set.
Good to know that ComCycle's customer / tech service is willing to help out with the issue on your unit. Please keep us informed how it goes.