Thanks for those who have responded.  I would go with American Science as
they have other interesting stuff to buy so to save on shipping (?).

I have also found a good site for LCD polariser, I think might be better
quality.  They have other lens, IR filter, etc.  Reasonably priced too.
http://www.3dlens.com/index.htm


Cheers, Ling SM

> > Any sources for the polariser or a good pair of polarised sunglasses?
>
> http://www.sciplus.com/singleItem.cfm?terms=8958&cartLogFrom=Search

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