Speaker Grills For Firebreast Installation

[Soapysoap]

Hi, I was hoping someone could hekp me. I am currently building a false firebreast wall to house my Plasma and centre speaker. The centre speaker is housed in a reccess built into the wall. The reccess is twice the size of my current speaker as I want to leave room to upgrade. What would be ideal is if i could cover the recess with a a large grill that would have minimum impact on sound quality. I've searched the forum and found supplier of acoustic cloth etc but can't find grills that can be mounted to the wall anywhere. Does anyone know of any suppliersr of a DIY alternative. Any help appreciated as I'm putting on the plaster board tomorrow.
Thanks
Soapy

[AndyST]

Have a look here:

Loudspeaker Grille : Coverings & Grilles : Maplin