Rezokar

I found that after a playthrough I had a surplus of smithing stones that I cant do anything with. Can anyone make a mod that unlocks the upgrading, but it gets more expensive each time? Ex for specials: 1-10 requires normal amount 11-20 requires 2x more than before, starting at smithing stone 1 again 21-30 requires 2x more than previous, 4x overall So on to infinity