All right, here's the link to the thread about these plates:
http://forum.club-subaru.com/viewtopic.php?f=33&t=76749
Use google translator if you wish but I think mostly you'll be interested in fitment/installation pics.
I bought few other items which he produces and I can confirm he's not a scammer but I did not buy & test the blast plates because of the above mentioned reasons and because I recently did complete STi 6-spd drivetrain swap on my GC8.
Based on my local Subaru Club members feedback they are good quality, thick steel, nice fitment. I've only read about tranny tunnel clearance issues after installing the plates on 06 WRX but he claims the issue has been fixed on new revision plates.
PS. I'm sending his contacts via PM and will ask him if it's ok to post them here.