I'm having the same problem actually, but you can't help me because I'm in Australia and we don't have the same stores
Yes...unfortunately I can't find the right felt. They have acrylic and viscose felt but no wool felt! I figured acrylic was a bit shonky (I've used it before) and viscose was a little more expensive but I figured it was better. I used the viscose and it was even worse than the acrylic - it tore so easily!