I don't think they would offer the parts they have for their own tests, research or product maintenance to me... I am not so confident about this headphones anyway. I paid a big amount for a headphone that is missing some parts, and I am thinking that might miss some more. I see the cup on the back have a hole and I can see felt coming out. I have seen pictures of the linear II and there is a plastic part closing this hole. Maybe the linear I is missing this part (I couldn't confirm with the pictures I have seen). But most people seems to agree that the only difference between the two headphones is a slightly different cup. So I feel I had been scamed at ebay. The parts will get to me on Monday, and if they don't do the trick the headphone will go back to their previous owner. He was selling it as a audiophile piece in excellent working order and condition. Well... I would upload the REW results here, but I am new in the forum and I don't know how to do it... Looks and sounds more like a disaster to me...
Yeah it sounds like you bought a bad pair,what with holes in the cup and missing parts. Thats terrible.
Since youre new to the forum,im not sure if you can post photos or not,but see the attached photo. Thats how you upload images from your computer.

