Yeah I know, you leave things lying around and don't get done for ages! Had the clusters for almost 2months before I fitted them! You won't be disappointed mate, the look spectacular and transform the back end of the car. Much sharper.
I'm a novice, and by that I mean apart from installing my new Headunit when I replaced the original VW Cassette deck with a new system, I haven't done any real work on the car myself. But I just had a go, takes 5minutes to fit each cluster.
Pull back the carpet in the sidewall of the boot, and disconnect the clipped in plug from the look into the light unit.
unscrew (its got a tap on the end, no need for a scredriver!) then there are two clips on the further edge of the cluster, simply push entire cluster up gently and it should pop out! Give it a bit of a wiggle should come out with little problem.
I got a great deal with my lights, paid £60 inc delivery off a guy from clubpolo. Any of those on ebay mate would say get ones from the UK as you're more likely to get free postage! Pay anything up to 90quid for replica units,(pair) bit more for VW Ones but no noticable difference!
Good luck
