Interior seat material

[Russ T. Fender]

Now that I have a running car again I want to start planning the interior.  The rumble seat cushions are original and I plan to reuse them but the interior of my coupe needs to be completely redone.  I would like to get as close to original as possible but was wondering if  anyone knows if leather seats were available as an option back in the day.  My car clearly came with a cloth interior as the remnants of it are poking out from under the seat covers that were installed in the 50's when the original interior material started to shred.  Years ago I was told by a member of the Plymouth 4 and 6 cylinder owners club that leather was available as an option but I have never been able to substantiate that.  Also, I would love to see detail pictures of a 30-U coupe interior, preferably an original interior, that anyone might have.  Thanks!