I found this on summit racing, Grant still makes a kit, info is below, out of stock but they say it will ship in 3 wks
Part Number: GRT-4591
Installation Kit Finish: Matte black
Installation Kit Material: Die-cast aluminum
Quantity: Sold as a kit.
Steering Wheel Installation Kit, Matte Black, Aluminum, Nissan, 521/620 Pickup, Kit