Try a concrete/block place. They'll probably even cut it for you. Mine did...
Well she told me I can order a second driver if I want so she can't be too unhappy about it. Not sure where I would install a second one however.
2 would be best as I can spread the drivers out and even out the sound. But first I need to complete this one and see how it turns out.
The final design will be 26.5 cf tuned to 12HZ