Just got off the phone with Sharkskinz. They said they are currently working on a pan for the 400. It should be done in a week or two. They have not set pricing yet.
speedwerks has a belly-pan for the FZR400, but you had better call soon since the demand is greater than the production! I ordered mine today and am 15 on the list! It is available in fiberglass or in carbon fiber. Their phone - number is (302) 697 - 7043. ask for Steve.