Manuel, Below find links to instructions on tear down of the Amazon Echo, in the tear downs it list what some of the parts/# are, or perhaps you can find a # on the component you need and do a search for availability. I checked Amazon for replacement parts for your speaker and they do not sell new replacement parts. Good luck.
I hope this helped you out, if so let me know by pressing the helpful button.
[[Topic:Amazon Echo]]
https://www.cnet.com/news/amazon-echo-teardown-a-smart-speaker-powered-by-amazons-cloud/