Here are some prices I got back from an on-line parts dealer for some replacement headlights, if I can't clean mine, unless you drive to each scrap yard you can not tell the good ones from the rubbish, here are the three quotes.
Headlight Lens (Pair, OSF & NSF) Used
£450.00
Headlight Lens (Pair, OSF & NSF) Used
£100.00
Headlight Lens (Pair, OSF & NSF) Used
£175.00
Headlight Lens (Pair, OSF & NSF) Used
£450.00
Headlight Lens (Pair, OSF & NSF) Used
£100.00
Headlight Lens (Pair, OSF & NSF) Used
£175.00