Datsun 1200 came with carpet covering the transmission tunnel in the front seat area. Rubber mats cover the floor.
The carpet was a blue/back or yellow/black houndstooth pattern:
Upscale GL and GX models had a 'foot patch' on the tunnel carpet next to the clutch pedal.
Parts
Tunnel carpet is NLA (No Longer Available) from Nissan in the USA, Canada and Japan.
Order custom carpet from ACC in Alabama http://www.accmats.com/Products/Flooring/Material.aspx