I dont think there are any current pigment colours that are close enough to dupe it TBH
From past colours I would choose probably one these 4 ~
Subtle
Coco
Sunnydaze
Sweet Sienna - though its prob closer to Smoke & Diamonds than Satin Taupe
Its stupid that MAC doesnt have a perm taupe pigment - but you know, thats also prob WHY they dont have one - its a guaranteed seller as an LE