sure, i have two....it's the little second tier on the plunger that broke off, and now it doesn't pour...i'm thinking i can stretch the spring being i got it apart now anyway, should be a work around until i get the flare ones...
The spring is there to make the taps self-closing, and keep them closed in resting (unengaged) position.
When you push or pull the handle, the rocker on the handle's bottom lifts the (plastic) lifting rod, which pulls the bottom of silicone plunger/seal upward, while compressing the spring. That creates a path for the beer to flow out.
The end one of the 2 flanges on the tippy of the lifting rod goes inside the bottom of the silicone plunger. The second flange, slightly higher up (the one that broke off) is the spring retainer. It prevents the spring from pushing against the inside of the silicone plunger, and probably from dislodging it when you squeeze the trigger handle, to open the tap.
That 2nd flange (the spring stop) should not just sheer off with regular use. Mind, there's quite a bit of tension on that spring, especially when engaging the tap, so that little plastic flange has quite a lot of force to endure. A stainless one should give much longer service time.
My plastic (barbed) picnic taps are 9 years old. Unlike yours, they get very intermittent use, such as on location, or on a fresh keg that's being forced carbonated, and such. Haven't broken one, yet...
But someone at our last campout had the lifting mechanism break off the bottom of the handle. The tap stayed closed, of course, but was inoperable. I just lent her one of my (spare) picnic tap assemblies.