You can mount rear turn signals, with no grab bar, if you are into doing a bit of fabrication.

This was the result of my winter projects, last year. ..
(Ford Model "A" taillight replica in stainless + vintage big truck driving lights for turn signals.)
Here you can see the aluminum piece I made to mount the signals. There is that flat part of the fender behind them that had to be hammered a bit flatter. Holes were then drilled all the way through both parts for mounting.

How the same lights were mounted on the front:

These mods were pretty fun - a lot better than the elephant ear after market turn signals the APO had mounted all crappy.

I also wired them so I can run just the front, just the back, or all four as driving lights - very handy when its very foggy/rainy out (which here in Orygun, it tends to happen)