4 by 6 grid cards?

I like 4 by 6 index cards because my handwriting is bigger. I have discovered that my favorite pale gray grid Stockroom Plus 300 pack is no longer available. 😭 These were so perfect - a lightly printed grid, heavy card stock, just right surface for almost any pen. Does anyone know of a reasonably priced option? All the ones I can find are tiny 50 packs and very expensive.