Well just got the Hexomat yesterday and tried it out... and it fits almost perfectly (about 1/4" gap on all sides, but the shape is an EXACT match to the area behind the second row seat). Unlike other "custom fit" websites (ahem, Weathertech), this mat was obviously designed specifically for the VehiCROSS, both because of the fit and because the box actually has a VehiCROSS sticker on the outside (although it did list incorrect years (2000-2004).
But as others pointed out in this post, it doesn't solve the issue of protecting the entire cargo area (with seats folded forward). But for now that's an issue for another day.