I thought my speaker gasket was also missing, however looking back into the part box I found it tucked under the flap at the other (unopened) side of the box. Glad I took a second (and closer) look. IFIXIT needs to do a better job securing very small parts as it is very easy for these types of parts to get jostled during shipping and then could fall out or stuck in the box unnoticed. I've purchased iFixit products for more than 10 years and am super satisfied their quality in parts and provided instructions. Hopefully they'll make some adjustments to their shipping containers as I'd love to continue using them.