I use a
Sprintech drop bar mirror, but it wouldn't work for you since you have bar-end shifters, and I wouldn't recommend it to anyone who isn't willing to look over their shoulder when necessary anyway. The
Mountain Mirrycle is fantastic for flat bars, and I expect the
STI version would be just as good for drops for anyone willing to accept that level of eyesore and willing to stick something into a $200+ shifter but I don't think it will work with your brake levers. (FWIW, I think the aforementioned mirrors are as close to vibrartion free as anyone needs.)
So, I think that leaves you with helmet/glasses mounted mirrors. I don't really have much to offer here. I used one for a few months, and it was nice, but I broke it in a crash and have been using bar mounted mirrors ever since.
Let me add that looking over your shoulder is a very valuable skill, and I'm confident you could pick it up with a little practice in a safe area.