X Chock or Fastway One step Chock

We also have the wide stance and we're adding chocks for the same reason as you. But we're making ours. They should be complete this evening as we're leaving Saturday for our spring break vacation. They really are simple to make. We had almost all of the materials around the house. We only had to buy bolts and washers. But even if we didn't have all the supplies at our fingertips the cost would be incredibly cheaper than purchasing the chocks. I also think they look more stable.

If you're interested in this route - search on homemade chocks. Directions are there.