I think the fully smoothed ones are only available from the US. Most people make there own. Either by using a product called Fusor to fill it, which is the best way to do it but its about 50 quid a tube! Other ways are using a donor rub strip and plastic welding a strip of plactic into the recess and using bumper filler over the top. I do believe you can also use a Bora rear moulding and plastic weld the Golf front end "corners" onto the "middle" of the bora strip. Bit of cut n shutting.