Most accurate reproduction carpet?

[javadog]

I'm thinking of replacing the original carpet in a 1971 914-6. It had the gray loop carpet originally. I was going to send off for some samples from several companies but I first thought I'd ask to see if someone has been down this road before. I'm not looking to change the type of carpet in the car to felt, sliverknit, etc. so I am only looking for recommendations that relate to the type of carpet originally used in the car.

Anybody already have this figured out?

Thanks,
Jeff