No problem Ironhorse.
I was planning on using them as an idea base, for making our own as well, either out of metal or MDF.
I was thinking I would put them in the bottom of the corner, and angle them up, towards the center of the cab for better sound, instead of facing straight out. Then make some kind of filler to go above them to seal off the opening.
We are a ways from that point, but there are SOOOOO many ideas flying around in my head.
Good Luck!! Make sure to post pictures of what you come up with, maybe inspire someone else too!