Did my field research. The Dahon Uno fits really well and the Dahon Mariner fits snugly. I liked the Mariner so I bought it. Coaster brakes are cool (the Uno) but I really like the safety of brakes on both wheels (the Mariner).
One important point. If a bike from one company fits, don't assume that "similar" models from the same company fit. Even if the two bikes have identical frames - baskets, fenders and other things make a big difference. The difference between the Uno and the Mariner was pretty significant and various pieces stick out in different ways so I would select a bike that you KNOW will fit, either by testing it or from some one who has the exact same model. Slightly bigger on the Mariner and it wouldn't have fit.