Some years ago I bought fantastic white heavy duty PVC sheeting (with clear sections for windows and rings to tie it down) from a guy in a small old-fashioned, crowded workshop with a huge noisy machine in a basement by the Old Post Office off Jaffa Road. Our succah dimensions have now changed. I have no idea how to find him again and if he is still in business. Does anyone have any idea? If not, any suggestions for where to buy this? Many thanks.