I bet you've never had leather seats recovered. I have leather in my 92 Bronco. I've done the drivers side twice and the passenger once. The passenger needs it again now. You have to buy the leather in half hides and it's tough to get an exact match. It gets expensive. The shop tried to talk me into vinyl but I wanted to stay with leather. Leather is a whole lot more expensive than vinyl or cloth, that's for sure. And, my rear leather seats are perfect and have never been touched.
Your car is a stumper. I doubt anyone would tear out the leather rears and have them redone with cloth to match.....not on a car that's not worth anything. And, I don't mean to say your car isn't worth anything. But, about the time those would have been replaced, the car probably wasn't worth more than a few thousand dollars. In the late 80's or early 90's these cars were really cheap. I remember seeing low mileage, mint 78 T/A's for $3K.
The TATA's are one of my favorites. It would be exciting if you found the buildsheet and it indicated a special order with cloth seats. It's not out of the realm of possibility but I think it would be a low probability. In any case, you've got a great car to work with.