Yeah, those turn signal stalks waggle all over. My missuz was giggling about it the first time she drove behind me ... I could see their shadows every once in a while, too. No more w/ the Euro tail lens though!

If you can get ahold of just the lens, you can easily convert the rear on the cheap w/ little or no modifications.
I found just a lens on ebay, so then I bought a pair of flush-mount after market blinkers - threw out the plastic casings and attached the mounting plates to the outer wall of the two black dividers inside the lens (they isolate the brake light from where the blinkers would appear). I drilled two holes in each divider to mount the blinker plates, and then enlargened two holes on the back of the whole assembly to run the blinkers' wires through. I bought the same size bullet connectors that the stalks use, hooked up the aftermarket blinkers to the stock wiring and voila! Minimally invasive and easily returned to 'pure stock' with none the wiser.