I had to replace mine when I rebuilt the cab over,,It's not to bad of a job ,the secret is to start with a new piece of stiff card board which I bought from home depot. it abt 1/8 of an inch thick. lay the old one down on the new mat. and tracr around it ..use a new balde in your razor knife and trim it out .line up the center overhead courtesy lite and start attaching the vynil to the new mat with a stainless staple. tnhe staple will not go all the way thru if the sponge is still in good shape. use the old board to line it up if it is still in have way decent shape..to install it line it up with the center roof of the cab and install the visors first.. it takes 8 men and a boy scout to complete this job but I did it by myself and it is very time consuming and you will get very frustrated before its all over ..Take your time and if you can get some one to help you it will go a lot eaiser. the card board will have to bend to a lot of different shapes but it will if you work it. Someone mentionee using 1/4 in luan but it will not bend in all the shapes it takes to install it around the window.
