They sound like the ones I bought, when I was filing out the hole to fit one my file went thro the glass at which point I burst into flames I only calmed down when I found a second hand one on ebay for £12.50. The mot is getting done next weekend so I'm going to wait till after before making the holes big enough for the new LED's !!£4.88 - http://www.ebay.co.uk/itm/120962619117?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
Could have got them cheaper from China but wanted to fit this year!
As Outofspace says, you need to enlarge the hole (I bought cheaper/dimmer ones than him I think) and swap polarity. Was a half hour job to do both.
I never use the fog lights, and when I do they look horrid against the HIDs/LEDs. As people have also discussed, HIDs cut through the fog faaaar better than fogs in my opinion, so these are purely cosmetic I suppose.