I cannot picture what you are describing. Is the tambor a left/right moving one or is it an up/down one? All tambors roll into a spiral to store them. Depending on where the tambor is you may have to dissasemble most of the cabinet it covers.
Here is the link I mentioned. They sell the P spirals as well as the tambor materials and all kinds of other neat plastics and woodworing stuff. Just ask for a catalog. They have may difent kinds of tambor sheets, from a formica finish to maple, hickory or redoak all unfinished so you can stain to match.
Hope this helps.