go to www.32north.com
as they're the guys that make the Stabilicers that Randy and I have. We got ours from Larry at 11 Mile Sports - and now I find out we have them at BPS.
They go up to HUGE - big enough to fit on Randy's Ice King II's (the ones LaCrosse doesn't make anymore!) and his Baffins. His Ice Kings are 12's, and Baffins are 12's too.
They are a ginormous Vibram sole with webbing straps with velcro and the cleats are like the cleats for wading boots - can be removed and replaced with a screw gun.
Though y'know, if you have some ginormous flip flops or similar sandals, screws and something to strap 'em on to your boots, that might work too.
I lost countless stretch-on cleats on my old LaCrosse size 8 ladies boots at places like the 'Mile, before I upgraded boots and got the Stabilicers. My Baffins are size 9 (huge for me), but that's on a size Small Stabilicer - I'm not kidding, they run huge! Their largest size accommodates a size 15-16 shoe!