i have one of these on mine,there on ebay but only non abs type,and a good peice of kit had a safari snorkel on my last disco and you wouldnt tell the diffrence in fittings and quality of plastic.
Having recently brought this one, I think it's good value for money given the high quality of it and it's universal fitting being as it has a long flexi pipe which suits either ABS or non ABS models.
I've seen it fitted on many a magazine featured Disco, so don't think you'll go far wrong with it. Very sturdy & high quality piece of kit - you won't be disappointed.
Free P&P too.