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Are the Weather-Tech offerings more than you're looking for? They're pricey but do a great job trapping and holding liquids if muddy shoes etc are part of your day.
Not sure if those are available for the E-Series or how far back---I have something similar but a lot cheaper. Here's that site's url: http://www.etristate.com/--maybe call and ask about part number: WCP33251.
I bought the Highland mats from Amazon, and it appears they are available for the earlier models as well (I searched JC Whitney site and found them). They may not be as nice as weathertech, but I was surprised at the quality for less than half the price.