I put the Fat Baggers hidden vertical hitch (part # FBI 900-10) on my '13 Street Glide. Only issue is it is pretty low because of the illuminated fender extension. The ball mount comes with a 1 7/8" stainless ball with a 3/4" shaft bolt. I took the mount to a local fab shop and had them bore it out to 1" and then ordered a 1 7/8" diameter ball with a 2" rise from Curt. It raised my trailer tongue to an acceptable height.
I ordered the wiring harness and isolator (FBI-HARNESS-6) and installed it myself with no issues. I've pulled my trailer over 3,000 miles with no problems.
I usually order from J&P Cycles. They are knowledgeable and shipping is fast and normally free on orders over $99.