Horse memento/keepsake recommendations

Hi all, I’ve seen so many posts recently about end of life care and decision making. My friend is going through that process now, with the knowledge that her horse probably has less than a year left (she’s a gray and riddled with tumors).

I am hoping for some recommendations for mementos or keepsakes with horse hair that I can order ahead of time. I’ve got a small amount of tail hair and about $100 to spend on this endeavor.