Hi, Needle9!
Thanks for reaching out to Microsoft Community and posting your inquiry. I checked the 3 posts wherein the user you tagged is involved. He mentioned on **this thread**that he taped those heat sinks. Your inquiry is quite interesting since it is not what we usually get here. I may not know where the said user bought this, however, you may try checking this Bing Search for you to get started on finding this item. We hope this helps you out.
Kind regards,
Janette_Z