Good question! I've wondered the same thing. His FB page was still up a couple weeks ago (if that's at all helpful).
I've considered calling his phone number, but didn't out of concern his <potentially distraught> wife might answer.

Edit: I overcame my fear and called his number. I called twice and got the same result 'beep beep beep'. Whereupon the call ended.
Perhaps someone in the Parts Express forum knows what's up with his designs. Alternatively, one could ask in the DIY Speaker Project Pad on FB. Javad or one of the other designers might know.