I got these on Amazon and they are $21. If you're interested, they work fine for me and they allow you to choose the size you want and they do make the earbuds sound slightly better or maybe the same but the isolation at least for me it improved significantly.
I'm very happy with these bud tips. The design allows the buds to stay in my ear much better than the original tips. Also, one of the first manufacturers that ships three sizes. Most, you are stuck with guessing your one size. $20 is a good value. Come on black or white.
