Can any of you Zip Fit guys tell me if Zip Fit liners only come in "whole" sizes, which was explained to me as 26.5, 27.5, etc.? If I was to go this route, I would assume I would need what I've always used in other liners, and that would be a 27.0. Current boot shells max out at 27.5, but are marketed as 27.0 (Raichle/Deeluxe). And...if anyone can recommend a good place to buy, this would also be helpful.