If the ones with the camera look good, are smooth and soft to the touch and fit snuggly in the Oring seat of the camera they should be fine. I used one for several years and then changed it out more for peace of mind more than anything else. I would encourage you to find at least the close-up lens to add to the camera. IMO the standard lens is pretty much worthless for UW use. It's minimum focal length is 4 ft which is starting to get to the end of the strobes reach and any fish you take a photo of will be so small in the frame it's not worth shooting. The closeup lens brings the minimum focus distance in to around 1 ft, making your shots a lot better. Remember, the first rule in UW photography is get close, get closer, get even closer and when you think your too close your about right........kind of hard to follow this rule if your camera will not focus at the correct distance.
The macro lens does a really nice job and IMO the lens that lets the MX-10 do it's best shots.
I will keep an eye out for more Orings.