i found them in the UK.. i emailed this mazda dealer and i ordered them and i got them this past week.
In my case (2006 GT) I was aiming for functionality, and 'mcguivered' a temporary mudflap, out of cheap 'off-the-shelf' ones. This was in 2006. It is now the mudflap's 4th winter.
The front one also hits the speed bumps. But it is flexible.
http://www.mazdas247.com/forum/attachment.php?attachmentid=121924&d=1198717335
http://www.mazdas247.com/forum/attachment.php?attachmentid=121923&d=1198717335
Looks good! Mine actually scrape on the ground when I go over a speed bump or taking a tight turn.(headbang)