String dampeners. Mathews
 

Can you get these string stoppers at a bow shop or are they something they need to order? Also would I need to retune my bow with new ones? Cuz I recently did and it's shooting awesome.

Do you need a string dampener or a string stop? In any case, trophybook archery carries all things Mathews. Check there.

Those are string stops. Any Mathews dealer should have them in stock.

Back when I shot mathews, I never found the need to retune after changing them, but you should check your own results on paper to make sure.