Dear sir,
I read your project description.
I am sure I can do this for you, in a timely manner.
Please take a look at my profile, here is my skillset as well as more informations about me.
https://www.freelancer.com/u/thms00.html
This is simple tasks using "sed" tools, I can do a bash script to automate what you want to replace as well.
Please come and have a PM chat with me, I am kind and helpful.
Willing to start right-away!
Regards,