I just bought a set of mats from McNeal automotive www.mats.com; about $90 + shipping.
Not bad at all; not exactly "custom", but you can cut them (don't worry, it's recommended!). They fit really well, are made of hi quality rubber and form well to the floor.
I was looking for "exact" fit (basically rubber versions of the carpeted Mazda ones), but if I did find ones, they'd be insanely expensive (well, more than what i wanted to spend).
Weathertech has enough different patterns that I would assume you would receive ones that would seem to be custom fit. That said, I highly recommend Cocomats. They are steep at $100, but are custom fit and last forever. I've never seen anything more durable. Here's a pic of them in my Miata. I originally bought them to use only during the rainy season, but I've ended up keeping them in the car all the time and saving the original red mats that aren't available anymore.