I'd recommend taking a site wide "poll" to see who might be interested. Usually with this kind of thing, there's a "minimum economic order quantity" you need to reach before it's worth having someone do a run. This (in general) worked wonders onceuponatime with the Imperial Club (rotors for Budd disc brake systems) and led to long-term better availability. No idea what that might be like for rubber mats, but it might be worth asking.