Update:
Sorry for the lack of responses, I used to get a notification when someone responded, but haven't seen any recently so I need to check my settings.
But nothing has really changed since this post on August 6th
Plug and Play Remote Start kit for 370z
The Auto kits has been available on and off ever since then, and for example there were two in stock on Sunday night (now currently 0). The kits are extremely time consuming to make so they tend to sell almost as soon as they become available.
On the Manual kits, I would never say never, but we don't foresee offering a kit in the foreseeable future.