I have a pair of fiberglass 'waffle' style sand ladders for sale. Very rough, gritted top surface. These can be used under the wheels for sand and mud or as bridging ladders. Each one is rated at 3000kg/6600lbs.
See: OKoffroad.com Recovery Gear - Waffle Boards
These were never needed and are brand new. $100 plus shipping
I also have two 2 gallon white RotoPax water containers along with the unused mounting brackets. Used but good for another 50 years! These things are tough. $50 for all.