Quest 3S glasses spacer replacement? (no serial number)

Hi, I have a question regarding the Meta Quest 3S glasses spacer. I was using a Quest 3S device provided by my university for a class, and I recently realized that the glasses spacer is missing.

Since the device has already been returned, I no longer have access to the serial number or purchase details. I wanted to ask if there’s any way to obtain a replacement glasses spacer separately, or if anyone knows where I could purchase one officially.

I’d really appreciate any advice or help. Thank you!