Ballastini is the brand. Arlen Ness is just one of many places to sell them. Google for them and you'll probably find better prices, and also find some other brands with similar looking styles.
I bought directly from Battistini and picked up the 3" extended forward controls, grips, footpegs for the rear and the the 3" extended shift linkage. I have a Rocker and they look really nice on the bike. You will have to purchase a different kickstand with the forward controls. I purchased the Ness stand that mounts in the two holes behind the primary and works by a simple hand flip. Here's the site:
How's the comfort on these? Are they too slick for proper stable functionality?
grips feel fine (i wear gloves)...the pegs are a bit slippery compared to the stock rubber ones my nt had, but ain't so bad...also check out hammercustomcycles, diff brand but good price