I don't know of one. You might ask your gm if he/she is interested, you could model a house rule after a trait or feat currently existing. I believe there is a feat that allows you to flurry with your dieties weapon, though a single weapon seems trait worthy.
6th level + sohei monk
What are you trying to accomplish?
Is there an Archetype that a Monk can take that let's him Flurry with any weapon he/she is proficient with?
Sohei can flurry with any weapon he has weapon training with, but can only get weapon training with a few weapon groups (notably not the best weapons).
There's also a feat that lets you do it, but its a little weird. Crusader's flurry Requires being a character who multiclassed to get the channel energy class feature. Zen Archer flurries with bows and Sohei gets a selection of flurry involving ranged weapons and polearms, but both of those are very different from the normal monk.
Yes, you read an archetype and what they get is just perfect to round out the monk to actually be good at something...then you read what they lose, and the restrictions, and you just feel the unrelenting pain that is being a monk-lover.