I bought some from China on ebay and they sent two different pair. The silver outside was the same but the fingers on the backside were different lengths. I needed all four of one length for what I was doing with them and eventually got them to send me two more. Other than that, they worked out just fine. If they're loose, all you'll have to do is heat up the fingers and bend them out a slight amount. I used a heat gun, rotating it in circles to heat all of them evenly, then pressed a 4" diameter flood light bulb with a curved lens onto it to bend them out evenly. Then used the air gun to cool and lock them at their new angle. I expanded the metal ring a little to fit the new, larger diameter. Some are also known to have the metal outer cap come unglued from the plastic backing. I peeled mine apart, sanded the surfaces to scuff them and put a healthy blob of two-part epoxy in the center then squashed them back together. All considered, the $15 total investment was absolutely worth the extra labor. Those in the pic look to be chromed plastic, so the separating layers won't be an issue.
