I recently tried to get a pair of ice boots for wide feet that fit the Grivel Rambo 4. I ended up getting these http://www.vasque.com/products/m-mpossible.cfm as they were the only ones that fit my feet and the crampons.

I am a bit skeptical of the lacing system though and wonder what people's experiences with it has been. I bought the boots at a Redwing store so can return them whenever.