I can highly recommend Westone products;
http://www.westone.com/music-product...-Pro-Audio/ES5
I have been using them for years. They sound incredible and hold up very well. You will have to go to an audiologist but you can find one that Westone works with on their website listing for just about anywhere in the world. And they are made in Colorado Springs. Customer service is excellent. A little pricey but very well worth it.
And if the cost of the custom ear molds is too high the universal fits work incredibly well too;
http://www.westone.com/catalog/um3x-true-3-way-monitor
I've used these with the Tri-flange tips and they isolate nearly as well as the custom molds and are very comfortable.
You can buy direct through Westone or through these guys;
http://www.earphonesolutions.com/
They have great customer service also.
I am not employed or endorsed by either of these companies, they have just taken great care of me over the years.