Right lads, just did this and here are some points.
1) the product from Wollies is great, part 113 as mentioned is a great fit, while it isn't felt covere it still does not look out of place and forms a great deal
2) BUY 3 METRES! Don't do what I did a go "hmm looks like 2m" you will be about 12" short.
3) Here is a quick how to on getting the old seal off.
A) Open the roof about an inch
B) Pull down on the sunroof headlining, it will pop down
C) Slide the headliner back into the roof
D) You will see 2 screws holding brackets left and right, front and back. Undo um' all.
E) From the outside of the car slide the sunroof out towards the front of the car.
F) Take your sunroof somewhere warm (as long as your car is secure) and place it on an old carpet or towel
G) Undo the 7 screws on the black trim and remove
H) Remove old trim
I) Refitting is the reversal of removal, as they say
I'll get some pics up soon, although I'll have to do it again once I have bought the correct length (I plugged the 12" Hole with some of the old seal