I held off on getting these when I bought the TV almost two years ago, waiting to see if I even desired to see 3D. Now, the glasses are scare and expensive. Ebay just has singles, if you want two pairs forget it.
I found some at videoandaudiocenter.com for $79 each, no tax free shipping. No idea if they're .63 or .64. I was up to page 15 or 16 of the google results. Some weird version of buy.com (rakuten or...something) also had them at that price.