I've been looking for hybrid foam filled silicone tips to try and it seemed like Kabutips or Symbio were the way to go for such a thing. I can't seem to find Kabutips in the US, but a company called Audio Equip based out of MN sells some of the Symbio products on their own site and ebay store if anyone is interested. Unfortunately they don't seem to have Wa or Wn models I'm looking for. I sent them a message asking if they plan to get them in stock.
