It would be helpful, if you would post a picture.
Here is a method, that might work... Go to Ebay.com. Do a search and find the generic part, by the picture. When you have it, look at the item description. Ebay sellers often use the OEM part number, in the title, even though their product is generic.
Having the part number, go to Mouser.com and look up the part. Download the data sheet.
If that doesn't work, try Clive, at BigClive.com. He knows a lot about LEDs.
I hope that helps.