frame/chassis rails info

[Tig]

Hi all,
I recently purchased an 84 coupe, great car and in excellent condition, accept for the drivers side center section of the frame/chassis rail. I noticed that they look to be removeable/replaceable.
Drivers side


for a comparison, the passenger side


I noticed that they look to be removeable/replaceable.
Does anyone know where I could find some new stamped rails? OE or aftermarket? I thgought seeing that this is an International site, I would have a better chance at finding what I need
If not I found this searching for new rails. This is waaaay more involved but seems to be the best route for stiffness as well as handling.


Thoughts, opinions, critisism?
Any info would be much appreciated.
Thanks