Where can I buy an anti-glare screen protector for a Sony Vaio VPCEB11GX laptop?

I need an anti-glare screen protector for a Sony Vaio VPCEB11GX 15.5" Laptop.

The only one I could find is this, but the site doesn't look very reputable.

Anyone know where else I could buy one?

1) Buy matte display

2) replace gloss garbage

3) profit