Covers that are longer (taller) than Thirsties Duo stage 2?

[veedeep]

DS is about to turn 2.  We haven't weighed him in a long time, but I'm guessing he's somewhere between 28-30 lbs.  We've been using Thirsties Duo wraps over GMD prefolds, and have been very happy with this system.  However, I don't think the Thirsties Duo stage 2 covers are really going to last us to 40 lbs like they advertise.  It seems that the rise will be too low (i.e., the covers won't be long enough from front to back) after he finishes another growth spurt or two.  We're using the red-edge GMD prefolds right now, and I'd like to switch up to the brown-edge ones (the red ones are on the verge of being too short - I have to work to make sure his butt AND his bits are covered well).  The brown-edge ones don't fit nicely in the stage 2 duos, though.  You can kind of stuff one in and get a weird bulge in the back, or fold a bit down and get a weird bulge in the back.  

So, to make a long story short, I'm looking for covers that are longer than the Thirsties duo.  I bought one Bummies Lite Wrap to try it out (XL size).  I like the length, but I'm not impressed with the velcro (very stiff and sometimes red-mark inducing) or the elastic legs (they leave marks).  I'll use it, but I'm not crazy about it. 

Any suggestions for big/long covers?

Thanks!