Need help with trim code on my 1976 mk1 3 door

[AUC-05L]

Hi All recently picked up a mk1 3 door from a fellow forum member.

Its a great little car but needs some new seats.

I want to get the trim code so i can identify the vinyl colour, but the trim plate seems to be missing! nothing in the boot. i suspect thats where it should be located?

this is the colour i am chasing (found it on the net)



Anyone know what its called or the code?

currently has a pair of different tan coloured seats out of a 4 door.

Any help would be awesome!