BTC89LS400

For a while I've been having issues with the wind deflector when its retracted, the foam pads that stop it from rattling moved on to the afterlife and now I'm left trying to find a replacement. The techs at the shop I work at gave me what they use, but the foam material is too thick, even when I shaved it down. Also after a few months it moves around and the wind deflector starts rattling again. Anyone found a good foam padding material that fits in this tight area?