When I did the radiator last weekend I found out that there should be an undertray/ air guide. I was passing U-Pull-It yesterday and popped in on the off chance that they might have an 850 in. 850s, like most 90s cars, are now at the point where they have stopped appearing in scrap yards but they did have one in.
Amazingly it had the bit I needed. It also had a set of moulded mats, so I bagged them too. They were dirtier than the undertray and will be getting a damn good scrub before they go in the car.