Has anyone else had this problem with their rangefinder?

Last June, I bought a Bushnell Tour Z6 laser rangefinder. It's not as good at picking up distant targets as my ancient Bushnell PinSeeker 1500 was, but it's small enough to fit in a pocket, and the battery lasts a long time, and I like it. (I had made myself believe that the PinSeeker was broken, but as soon as the Z6 arrived I discovered that it still worked fine. So I sold it to Kevin for $48 and a ball-marker.)

My only beef about the Z6 is that the eyepiece, which keeps sunlight off the lens while you're using it and is the thing you turn to adjust the focus, looks solid but is actually a cheap, floppy rubber tube that's held in place by nothing but some kind of not-very-strong glue. Here's the eyepiece:

Mine came almost all the way off one of the first times I used it, but I pushed it back on and tried to be careful with it. At some point during a round today, though, it disappeared. Here's what my Z6 looks like now. You can see a tiny, booger-like remnant of the old glue, over on the lower right:

Has this happened to anyone else?  I didn't handle it roughly, a lesson I learned with my first rangefinder. I just used it while playing golf. And -- Hey, Bushnell! -- what am I supposed to do now? Is my rangefinder still waterproof? Can the eyepiece be replaced? Should I try to trick Kevin into selling me back my PinSeeker?

MyUsualGame