The windlace has a special flat area (called a LEG), which is tucked into the leading edge of the door opening (by the rear panel), and is held in place UNDER the interior panel by special clips with teeth in them. Quirey Quality Design (the owner of which is a member here
@QQE) has the correct stuff for your Sport Fury. Way cheaper than you would find on eBay... such as where I found this picture:
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The flat part is what the toothed clips bite into. The round part is what you see outside of the interior panel.
You can see the windlace in these pictures here - not very good, but all I could find on the net...
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To install the windlace, you must remove the back seat, then the side panel, and the sill plate, and then install the windlace along the door opening using the pinch clips. Hopefully yours are still there! You expand the pinch clips by opening them up with pliers, positioning them over the leg of the windlace, pinching them closed. Leave them installed in the body structure as you do this to permit the right spacing on the windlace. The top few inches of the windlace tucks in under the top of the interior panel, and the bottom few inches tucks in under the sill plate - it is obvious where...
You only need about 8 feet at the very most. It is colour keyed to your interior, so black panels get black windlace. Yours should be a nylon type woven fabric very similar to the first picture above.
I hope this helps.