GPS for Nikon with 10 pin connector.

Bluetooth and wired solution.

Foolography.

Foolography still has the special offer price of 199€ from the previous price of 270€ for the Bluetooth ten pin receiver.

It is still more expensive than a Garmin 10X Bluetooth GPS.

http://www.foolography.com/home.php

Red Hen Systems Blue2CAN(USA)

https://ecommerce.redhensystems.com/pc-47-3-blue2can.aspxstems.com/pc-47-3-blue2can.aspx

Dawntech(Hong Kong, China)

http://www.dawntech.hk/di-GPS/index.htm

Custom Idea(United Kingdom)

http://customidea.com/shop/index.php?cPath=38&osCsid=0c522b635d1619c2e72036af6af30ae0

Solmeta(Shenzhen, China)

http://www.solmeta.com/en/