Comply foam tips for the JVC HA-FX1X.
If you want a new pair of IEMs I would recommend the Klipsch Image X10, with my experience they isolate VERY well due to the deep well formed seal in your ear.
Comply also makes an isolation tips for the X10.
Audio Tecnica also makes a pair of active noise canceling IEMs
And once again isolation comply tips for the ATH-ANC23.
Edited by Aaron94 - 1/6/13 at 3:44pm