Ok, here is my problem for the day. We have a seasonal site in Delaware w/ a screen room that is attached to the RV itself. The awning that came w/ the rv is not used as the roof to this room, there is a canvas fitted roof attached to the rv though a channel on the rv . HERE is my dilema, we are having to replace the canvas because we are enlarging the room w/ 90" more of panels for this summer. We have someone making this for us ..................however, we don't have the tubing that fits in to the channel for the extension. The man that is making this new cover for us is using the tubing from the old canvas for part of it but we don't know where to purchase the additional tubing that we need. Does anyone know where to purchase the tubing? The tubing is a hard plastic/rubber?