Dart 70 Front seat cover

Hi!

I'm planing to put on some new seat covers on my front seats, they are worn out now.
But I can't seem to find anyone that sells the same type as I already have.
I'd like to purchase the same type as the back seats because it looks like they have never been used.
So I would like to just replace the front seat covers.
Does anyone know where I can find this type of covers?