I bought two extra sets of 3D glasses for my 60" Elite (which I am loving, btw) from BB. They are model number AN3DG30. I think they were $49.99 ea but I got them with BB Rewards points so I could be wrong on that. They work great, I can't really tell any difference between the originals (model AN3DG20EL) and the newer ones. The new ones are a slightly different shape, narrower, and the button is on the top above the nose bridge which is easier to access IMO.
However, there is one annoying feature which is that the charging plug is different on the two models. The new ones are using a flatter profile USB charging connector vs the originals. I think the originals have a USB Mini-B connector and the new ones have a Micro-B connector. What a PITA! I now have two different charging cables (actually 4 since I have 4 pairs of glasses)! The difference is subtle too so in low light it is difficult to figure out which is which. No, the world won't end over it, but GGRRRRRRRRRRRR! There, I feel better now.
PS: Anyone have a favorite/cheap charging hub that works?
PPS: And before someone pounces, yes I double posted - this is in the Sharp thread as well by mistake. Sorry.