seanhunt1988, I recently repaired a Logitech MX Master (1st gen) and I reused the old “rubber”. I did use isopropyl alcohol and tried to remove some glue, then I glued it back using some strips of very! sticky double sided tape (2mm width), meant for mobile repairs.
That tape is incredibly durable and it’s also very, very thin, which allows for the rubber to place like originally.
The one I use isn’t sold by iFixit, but it’s all over Amazon [link|https://www.amazon.com/sspa/click?ie=UTF8&spc=MTo1OTQ3MzQzNzY5Nzc3OTIyOjE2NjgwMTQ0MjQ6c3BfYXRmOjIwMDAxOTUzMDIxNDE3MTo6MDo6&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&url=%2FKaisiking-Repair-Adhesive-Tablets-Laptops%2Fdp%2FB0817K1JQT%2Fref%3Dsr_1_1_sspa%3Fcrid%3D1V3V5SYKI9ZSJ%26keywords%3DMobile%2Bphone%2Btape%26qid%3D1668014424%26sprefix%3Dmobile%2Bphone%2Btape%252Caps%252C229%26sr%3D8-1-spons%26psc%3D1|mobile tape].