50 shoebox seats

The 50 shoebox 2 door sedan that I recently purchased as a project is pretty complete with the exception of the front and back seats. Does anyone know if I need to look specifically for 50 2 door sedan seats or will seats from say a 4 door or coupe fit, and do they need to be from a 50 or will 49 or 51 fit.
Thanks Ron

 

The four door front seat backs won't be split, so you won't have access to the rear seat area. 49-51 should fit, but stick with 2 dr. seats,

 

Thanks, I appreciate the info.