An inexpensive bottle jack should do the trick, as long as the ram has enough travel to lift a wheel off the ground. 6" should be enough. Place blocks under the jack to bring it up snug to the spring where the axle attaches, jack up the wheel and slide 2x8 boards underneath. Board must be as wide or wider than the tire tread and should be pressure treated wood so they don't rot away. Plastic leveling blocks are also good. Solid concrete blocks/pavers can also be used if supported sufficiently on a smooth sand base (no voids or rocks underneath, so the block doesn't break).