I have a clear one. In decent shape but it does have some tiny spatter dots from welding.
It would probably clean up pretty well with mothers polish and some elbow grease but if your looking for a perfect glass then this one is not it. If the rest of your glass is good then I would look to ebay for one.
I have seen several on there starting around $20.00.
If you want to take a shot at mine it would be $10 plus shipping.
Thanks,