I see, and I don't blame you for not wanting to experiment with them as they are expensive. I have brand new one's, trust me I know. I have opened up plenty of headlights with the oven method, and you are right... That is the only way to open them. If you have never done it before it can be daunting but if you are careful and take some tips it can be done flawlessly. I have opened up the plastic lensed jdm siR headlights, dc2/db8 headlights, I think the bumper lights could handle the heat. Or you could take what you could get for yours on ebay and put the $ towards a set that is cleaner.