Re: RFing 1 year old with a full leg cast?
I am pretty sure that the Hippo by Britax mentioned by the pp accomodates full body too. You need to start working on this ASAP especially if you need insurance to cover or reimburse because it is $$$. I am so sorry you are dealing with this. I spent some time casted as a child and it certainly presents challenges.
Just in case.