Assembly and Levelling of Multiple Small Audio (Voice) Files

Assembly and Leveling of Multiple Small Audio (Voice) Files,
Hi there,

I am trying to preserve my friend's voice for a personal project because he has been struck with throat cancer and is unable to speak now.

Luckily, we have around 110 short audio files. Most are between 2 and 5 minutes and consist mainly of MP3 and some AIFF files. The quality of the audio files are quite good.

I need a talented sound editor to stitch all of these files together and apply auto-levels so we can have the best quality sound that is possible all on one .WAV & MP3 sound file. I then need to have that single file for this project. To make it easier for you to produce - you won't need to put the files in any order. They just need to sound as good as we can make them. I know there are audio Ai services that can achieve this but I want us to do the best job possible so it needs someone with a good ear and a good heart to make sure everything is as it should be. I should of course do it myself - but I am overwhelmed at the moment and need this done asap.