I have been driving my M1008 around the hay meadow to gather stones for a stone wall. When I hit bumps, I feel like I am going right through the seat foam down to the seat frame. I looked under the seat, and see an assortment of cheap thin foam stuffed in there. It appears that the original foam has given up, disappeared, been dissolved by noxious gasses..... whatever, it is not doing the job. Can I get a new bench seat foam anywhere? When the posterior isn't happy, the vehicle doesn't get driven. Thanks for any tips. H.