1 and 2 sound like a straight forward job if you get under the car and the old ones come undone. I replaced all of these on my MK2 with little trouble but that was before I lowered it.
3) I am not sure which part this relates to... Buy the part and I am sure we can find a way to fit it...
I rate http://www.murraysdirect.co.uk/ for parts, they are based in Hatfield and always supplied my MK2 parts after I gave up on GSF (Great Stupid F's). See if you can get the parts tomorrow and then someone will be able to help out, I might be about on Monday...