I just can't find one.

Try looking in the Recommended Weapons Guide from the Useful Battle Threads sticky c:

I can lend you for collateral together they heal 175hp per turn, and don't break, plus the polearm is very stong the collateral is a lot as they cost a lot^_^; but they're worth it~

If you are looking for cheaper ones think about Malevolent Grimfruit, Rreign Mace of Malice, The Juicer Pro, The Juicer or Red Rreign Staff of Lore. Which are in the guide posted.

Thanks guys, I finally figured out the red rreign staff of lore and it seems to be working