When you say replacing the power center... I ask WHY.
If your concern is that the power center includes the converter and the converter you have is ... Not the best....
Go to best converters and scroll down to the additional information frame (NOTE: I'm never sure if it is bestconverter or bestconverters, one of them is a sound company the other the one you want).
This shows how to replace the "Guts" of your power center with a new and improved like the Progressive Dynamics 9200 Cheaper than replacing the whole thing.
or in many cases you can "Splice in" a 9200 mounted elsewhere and simply disconnect the 120 volt lead to the built in converter keeping it on board as a spare.. I have a spare (Both are top end 3-stage jobs) and am often very happy with that face (My 9100+wizard (equal to a 9200) is a plug in model and from time to time I snag the cord and it's not plugged in any more, 3am is when I usually figure this out and no way do I want to get dressed and go out and fix it.. So CLICK and the back up converter... converts.)
Home is where I park it!