speaker cover cloth?

Hey guys im wondering if you all can help me out with where to get this type of cloth or a better way to cover this speaker port.

First of all Im making a CB radio mount for my cars dash.  I am making a "port" type thing since the speaker is mounted on the bottom side of the radio and it will be behind the dash. The port will be under the radio in the picture below.  What im wondering is what type of 'cover" cloth should I get for the port cover?

I was thinking some sort of speaker enclosure cloth that goes over speakers like in home theater systems and even on some door speaker grills.  I will be making an insert for this cloth to cover the hole with.

Heres the picture of what I am talking about:

check ebay for remnants for cheap. Or hit the local thrift shop ^-^v

Ganbatte ne!

No problem, its good to have extra so you can replace the grille cloth when it gets old or dirty .

i have bought speaker grill cloth at the local fabric store and they will sell as much or as little as you want