When the originals get holes in them and are no longer able to work well, you gotta be able to defrost the windshield... Safety is higher priority than trying to find an original part...
IMO better to duct tape the original. It can't come apart 'cause its one piece of coil.
I was going to buy the gaffers tape but the adhesive is rate to 200F. That's a little too close for this engineer. I like factor of safety when I don't know about something. Got some fire resistant tape that supposed to be good to 200 C. I knew metric system was good for sumptin. LOL. Polyken Fire Retardant Sealing Duct Tape, Black 268FR | Zoro.com