Aeropress
@pepperjones ...yep...different folks, different ceremonies...
Try Amazon, also I have seen similar shapes in Walmart...can't be sure about the size from the pic
See if you can find the company that manufactures just that part. Then either 1) ask to purchase a single replacement or 2) (ive done this) invent a company name for yourself and request an example part for a project (you usually get two or more ) and yo have to use your real phone, just say still evaluating (never more than two calls). This idea briefly saved my failing marriage when I broke something.
Look at eBay and Wish. I’ve found things that I truly believed were discontinued on there
@pepperjones NP ??