I've replaced them on other cars before and the swap is pretty straightforward. Usually there is only a matter of a few screws and plastic clips that attach the panel to the gauge cluster. The problem sometimes is trying to find just that component. In some cases the dealer will only sell a whole cluster replacement and not the plexi-glass panel.
Might just want to make a trip to a dealership parts department to see if you can source it easily from them. If not, you might have to start hunting through junk-yards and online sales.
Oh and BTW, did you have work done to the car recently? In my line of work, that sort of stuff can happen when you are tearing apart dashboards and other components of the car. It can get tricky around the cluster because the steering wheel isn't installed until everything on the dash is in place on the assembly line, and you usually would want to avoid removing a steering wheel if possible after the fact.
A mechanic or installer might not have noticed the damage (or in shady fashion, hoped you wouldn't)
