In a pinch, I made one huge spiral finger for tiramisu when I couldn't find packaged ones.
I used Rose Levy Beranbaum's genoise recipe and piped out the spiral on a parchment sheet, then cut the tiramisu's square base and used the remaining baked pastry as a second layer.
I will never go back again to the drier packaged lady fingers. It was the best tiramisu I've ever made.