Anything that is "Authentic Porsche" is completely unreasonably priced. But you can get a great set of Llyod mats with piping and script for less than 1/2 the price of the "authentic" mats.
I checked with Epic but it wasn't clear if they had them for the 987. Suncoast has some nice ones (including custom just call them) for $98.31 with Script - add another $10.00 for piping.
Suncoast Porsche - Mats Link
I just think they are probably nicer, you get exactly what you want, and they are way cheaper.....
Oh yeah - get yourself a "Red Clip" after you buy your Boxster....