Is it possible to get spare washers for the valves in a SIM? We have two Quechua A400's. Don't think they do them anymore - blue and 7cm thick. Very comfy, but keep inflating when valve closed tight. Looks like the washers have split. Had them for about six years and used on and off. Want to go back to them now instead of airbeds, so would be great if we could fix them.
That was a long post for such a little washer!!!