only certain people can carry Neptune. Stoopid is the guy for Houston, Tx.
I think that S61 something guy is a dealer for the florida area. I would try to contact him for more prices and such.

Im gsr turbo aswell running Neptune with 2 maps and i love being able to swap maps by a switch at the track, great feature.
If traction is a problem too ask about the quad stage boost controller from turbo xs that can tie into Neptune aswell for boost per gear