Thanks guys. I was thinking the same thing on just make a similar cab based on his dimensions and photos. I think I could probably make a pretty close copy based on all the info at his web site along with a little time on AutoCAD. It wouldn't end up being exactly the same even if I had the plans (my cab is a take from the LuSid design, but not an exact copy by any means).
I didn't mention it in my post above because I was afraid the thread would degenerate into people screaming about copyrights, etc.
I did show my friend the UAII cabs and said we could buy those plans. He liked the one piece look from this custom-arcade cab better, though.
Looks like I'll start messing with the profiles in CAD.
I hope this ACAD project doesn't end up 1/2 done like the cabaret I started a couple months ago based on the Robotron mini (modeled from rough dim's and pics only there, too). I ended up getting a Pole Position with no monitor to play with for now. Maybe I'll finish the cabaret next year

Thanks for the suggestions!