Projector polarizer where to buy?

[porschedrifter]

Does anyone know where you can buy projector polarizers?

I need a blue one

I have a blue spot on the top right corner of the screen only noticeable on blue scenes or black scenes, Is this a polarizer?

Eiki LC-XGA980UE

 

[porschedrifter]

I was reading around and that its not a polarizer but a blue dichroic mirror that could be the culprit. Anyone have any info on these and the types they use? I found a few sites that sell them.