Dual Axle Leveling Question

The space between the TT tires will accommodate one leveling block but if the side to side difference is more extreme I can't place two side by side with a third on top to build a ramp to level both wheels. Trying to roll up on two stacked on top of each other just pushes the block forward. I was thinking of having a 1x8 board cut to length and somehow attaching at least one leveling block (and maybe a half of one) to it to keep it from slipping off... don't know if this would work, not sure how to attach it firmly without risking a tire puncture should it fail so I'm hoping some of you have already found a creative fix and you'll be kind enough to share.