I just purchased a 2004 V70R wagon. Looking for a good rear cargo mat that will cover the ENTIRE rear area with the seats folded down as I run an animal rescue and need the cargo space. So far the only pre-fabricated types of cargo mats/trays that I can find just fit into the rear trunk portion when the seats are up. Any good suggestions on a manufacturer that sells a decent heavy-duty rubber/flexible mat that will cover the entire bed area with seats folded down?

I contacted weathertech support and they said they don't have such a thing. I'm thinking I might have to get creative and use some sort of truck/suv liner just to get by and save my interior, but I'd really like something that looks like it belongs. Any suggestions?