go to your local ronix dealer and they should have the heater. The j bars are for extra ankle support- they go between the outer shell and inner liner. YOU CAN NOT MOLD THEM IN A BATH TUB OR HOT TUB, THIS WILL VOID YOUR WARRANTY : )
J bars hold your heel down if they are lifting in your boots. Look in between the back of the inner liner of the bindings toward the bottom and you will see some velcro. Thats where the J bars stick to.