I am having the same problem. Pool installed last year and I accidentally left a valve closed which caused a lot of ice build up in skimmer. My faceplate cracked in 3 places. I bought a new one and a gasket.
My plan is like
@zea3 recommends. I am going to drop water level below skimmer. Remove screws and replace. My liner is unibead so it should stay put once faceplate is removed. I think you would be fine with any liner.
My pool wall bent a little too from the weight so I'm not 100% this will work... i may need to just deal with it.