You can get it from your local Polaris dealer.
It is a HD5 Gen 2. The extras you get by buying the Polaris version is the branding, the white plastic cover (the cover does not come with the non-Polaris version, but is available), and the pre-loaded trail maps. I'm not too sure about the maps yet, as I haven't installed it. As soon as I get it setup, I'll do an install and demo video.
Here's what I may be changing to for the seat (Kirkey Model 58):
That seat is 10lbs. lighter than my Sparco EVO II Plus.