yeh i have a combo too, bought on ebay at different times, you can't tell the difference. Only thing to (maybe) watch out for is the different styles...
there are some which are just a ring which sort of stick on only to the top of the original (so you can still see the original grey bits) or there are the ones which completely replace them- these are the ones I have, look better, obviously less 'stuck on' IMO. If that makes sense