Seem to be harder to get hold of here in the UKI use pnasonic glasses.
I got them for $11 apiece, 5 pairs after i tried other inexpensive ones.
They are 120hz refresh. No clue if 480hz are better or not. I looked up some old threads but did not find much useful.
For filter - just use black electrical tape on sides, 52mm fits right in the center
I canf ind the 55mm on amazon for 15.68
52 seems to ship from somewhere far and not sure i trust it