If there are any scratches on the front panel do not have a go at rubbing them out!
The front panel is anodized and although wet and dry will remove the scratch it will also remove the anodized surface leaving worse blemish as it were.
A nice window mod would suit the side panel alternatively you could strip the side panels back to the alu underneath for an all silver case - nitromores would do the job nicely. if you don't want to go either of those roots and assuming the scratched panel is the left side as you look at the case, then you could get a pre modded window Google for "CoolerMaster SPB-201FV Panel" Assuming it's the SX1 version - slated top blow hole (SX2 has a mesh top blow hole) as that window wont fit the SX2 and afaik you can;t get the champagne window panels for the SX2 any more.
The 201s came with only 3 5.25" bezels so if you have 2 still then your only missing 1. They cannot be purchased off the shelf, but you may be able to get replacements form cooler master (will have to pay for them) however they will not be exactly the same as the original 201 bezels as cooler master no longer have any 201 spares! Wavemaster,210,220,110,111,200,praetorian bezels will all fit
Blooming good find though, and please post some pictures!
Edit: you say it's a 201b - the "b" stands for window, so i'm assuming the scratch it on the other side as your thinking of modding a window into it