Is there a way to get a Modular Router to remember that it was pulsed if it didn’t activate?

I am trying to automate a Botania Mana Pool with a Modular Router setup, so I need it to output an item, wait for a signal that means an item got converted, then output another one. Pretty simple if there is a constant stream of items, but there's not. Is there a way to make it remember that it was pulsed if it didn't activate? I have access to Create for it's redstone components and AE2 for Redstone P2P Tunnels if they are useful.