CS: I actually gave up trying to find them at a reasonable price and instead, recently picked up two pair of Corolla floor mats on craigslist; one for winter destruction and a new pair for summertime. I also picked up a brand new Matrix rear cargo mat from the Tampa Toyota dealer. They had a great price last month on their internet website and only charged me 99 cents to ship the cargo mat. It has Matrix embroidered on the cargo mat.
http://www.partstoyotaoftampabay.calls. ... at3=140792
The Corolla mats are not as thick as the OEM 2nd gen Vibe mats but they do have the Corolla moniker and they are the newly designed Toyota mats, meaning they are shorter and don't go up to nor behind the pedals. I have found many Corolla mats here in the Delta Quadrant on craigslist, as well as craigslist down in Tampa when I was travelling there. Good luck.