<VV> Seats

[Ron]

I was in the process of stripping the upholstery off of the individual seats that were in my '62 wagon when I found that four of the springs were broken in the drivers seat back.  So, I need a replacement seat frame and the question is, are all seat backs the same and if not, which ones are?  I have a few late seats I could look for in a storage garage a few miles away.  
A complicating factor is that I'm not at all sure that the seats in the wagon are original.  It would then be nice if all seat backs were interchangeable.  What's the answer?

Thanks,
RonH