I foudn them at spencers, but they wanted $20 for the 6" ones. I ended up getting some on Ebay for cheaper. I got a 12" blue one, and two 6" ones. Not sure how to incorporate these yet, but they were a good deal so I spent the money. They are sitting in their boxes in my closet right now ...... I am still gathering other bits and pieces. I also live in South Florida so building something in the garage is going to have to wait until the cooler months most likely (depending on how long I can hold out making the cabinet

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Still fiddling with the design and gathering hardware for it. Hardest part is figuring out what to do with the speakers. I have no knowledge on how to connect home audio speakers to the cabinet. I was originally going to use a few pairs of computer speakers only, but do not know what to do yet for sure.