Not perfectly cut, but I finally replaced the stock silicone sidegrip! (Steelseries Rival 600 w/ Paracord, Hyperglides and GT-5000 Griptape) : r/MouseReview
STEELSERIES Rubber Grip for RIVAL 600 / 650 SIDE Replacement Mouse Accessories | Lazada
Rival 600 grip alternative : r/steelseries
Mars Fox Mouse Side Panels/Anti-Paste/Side Grip for Steelseries Rival 600 / Rival 650 : Amazon.ca: Electronics
Rival 600 adhesive problem still happening on REPLACEMENT side grips! : r/ steelseries
Rival 600 Gaming Mouse | SteelSeries
How to Re-Glue Rival 600 Rubber Grips (With Pictures) : r/steelseries