Greetings from the Rainforest!
You can order chips from our website here: http://www.audiocontrol.com/t34/8138/735017/Accessories-and-Remotes/18dB-Module.html
The Epicenter uses 18dB/oct chips for the PFM (subsonic filter). As far as changing the chip, other posters are correct, just pull the old chip straight out (careful not to bend/break the pins) and insert the new chip (using the same care). When we pull chips here, we just use needle-nose pliers; grip the middle of the chip, gently rock back and forth as you pull straight out. Put the new chip in by hand - the pins are usually slightly splayed and will need to be guided in by hand.
You can always call us or email if you have any questions.