I had a parent ask me about replacement covers for her seat. I told her that she needed to go with a cover made by the seat manufacturer... (she was looking into some home-made custom thing she found online.) As far as I know this isn't allowed because who knows how much padding and such is in a seat that isn't crash tested with the seat. I told her I'd ask here and see if anyone knew more than that... maybe Britax should make more cute replacement covers