The one that fits my 2007 is

Harley detachable sissy bar with locking attachment - tall medallion style chrome upright # 52777-85A with mounting sideplates # 52866-06A.

But the 2010’s are different, for sure.

 

Your WG looks very nice. I just bought a 2016 WG. I am looking for a different seat, I see you have two different seats in your pics. Which one do you like better? Is the lower one a Le pera? which model if it is?

 

My 2010. Screaming eagle stage 1 (with tune), Vance and Hines pipes. Big sucker intake. 16" FBI bars with 1-1/2" riser. Burley 16" kit. Legend Revo-A rear shocks (13"). Mustang step one piece seat. Pirelli Night dragons. I bought a 2008 Fat bob rear fender from a guy in New York. I purchased an LED tail light off of E-bay. Some knock off cheapo thing. I had to use some ingenuity to get it to work with my 10 FXDWG but I have integrated blinkers, tail light and when I hit the brakes the blinker section lights up (amber). So - got some more work to do.
Damn things handles absolutely beautifully and is loud. Just the way I like it!

 

Who did the paint? Perfect bike in every way!