I agree that Epson projectors mounting points are farther apart for most of these "universal" mounts. If you use universal mounts you must mount on 3 points - front one and back two. The first time i tried this, the guy who came to mount the PJ, mounted using the front point and the two front ones. I hadn't noticed it but only 2 days ago, i did. It had held but i'm sure the weight of the back of the PJ would cause some damage in the long run. So i went to the local computer hardware retailer and asked for mounts. I had taken my existing mount and was able to measure. After i looked around, i got one with the clamps slightly bigger. It fit perfectly with some to spare. Now it is perfect - cost me Rs. 1400 So just call some computer hardware retailers in your locality and check for yourself. The online stores do not mention the length of the clamps and you could end up wasting one more. If you are willing to order through amazon.com/ishopinternational, you should try
Amazon.com: PCMD All-Metal Projector Ceiling Mount for Epson PowerLite Home Cinema 5020UB: Electronics . It should cost you around 6.5k shipped to your doorstep (customs, taxes and all)