Pics would definitely help. Do you have a model number on one of your ear stems?
As for lens shape, there's the standard that is rounded on the bottom and there's the XLJ, which flares out on the outside edges a bit.
There's Grey, Grey Polarized, Black Iridium, Black Iridium Polarized, OO Black Iridium Polarized, VR28 Black Iridium, and might be a few more i missed that were available for the flaks