Most center braces are a seperate piece of glass that is siliconed in place to prevent bowing of the display. You could easily remove and replace the center brace. Maybe consult a local glass repair shop for specific information.
A 220 Oceanic that I do maintenance on had the center brace come loose on the backside a few months ago. i contacted several local glass repair shops and luckily located a shop owner that is also a hobbyist. he came over and removed the brace...cleaned up the old silicon...re-installed the brace...all for a decent price. As far as I can tell its as good as new.