hello ray-
I have the exact same problem - 1999 golf gti 1.8t
the same part snapped- got the RAC out to look at it and we tried to cobble together a replacement bit using a blot and some nuts but no luck.
I'm about to attempt the repair myself, did you successfully repair it? Which part did you order? from where? did you remove the airbox? how easy was it to adjust the connector and get the gears to work again? did you need any special spanners etc?
sorry about all the questions this is my first attempt at repairing something like this - any help would be much appreciated...