Clear plastic for instrument panel

Does anyone know where to get the clear plastic pieces for your instrument cluster? Mine are kinda foggy and scratched up. All my gauges works great so I dont want to buy a whole new one. I was wondering if I could make my own somehow. Other that the speedometer they're all flat. how hard could it be? any ideas?
Also It's been a minute since I've had a cluster apart. Is there one big plastic piece or does each guage have its own piece?