Go to a breakers yard and find a mk5 golf or a jetta or something similar you'll be able to get the bolts from there and only pay pennies.
For your rectangle surrounding the top open/close wheel, I had this problem because I snapped one of the feet that hold it in place, managed to get it to stay in using double sided sticky tape, can't tell the difference now, you'd never know that there tape holding it in, maybe give that a go?