satanisloveIf you're going to order more foams, I'd recommend you buy sure Shure olives instead. They're much more durable. Or go all the way and get the custom silicone tips, then you'll have comfort, isolation, and some say slightly better sound.
satanisloveSensaphonics, in Chicago makes them. Check their website for approved audiologists to get your impressions made and they have their own lab create them. I can tell you that they make quality ear plugs made to fit the Ety filters, I'm sure they can deliver what you're looking for. BTW, Etymotics is also local (Elk Grove, IL) so they know each other very well.
http://store.sensaphonics.com/ProductDetails.asp?ProductCode=ETY%2DSLEEVES%2DEARPHONES