Trevor, aka SiliconAngel, might be able to check his contacts that have made up the car mats for us, try sending him a PM and I'd say he'd steer you in the right direction, barring anyone in the forum jumping in here and saying that there is an off the self version.
Never heard of anything off-the-shelf. I've spoken with Paul and they don't / can't do them either as you need special moulding equipment and he estimated it'd cost three or four grand to get the moulds made up for a run. So you'd have to want them pretty bad!