84-0458 is last reported to be with Air Cargo Carriers in Milwaukee, Wisconsin. It would appear that she became a parts bird as soon as they had acquired her.
http://www.airport-data.com/aircraft/photo/000522208.html
The Forest Service acquired their four C-23A's from the US Air Force back in 1991 and have been operating them for 26 years already. I personally have been crewing them for 20 years now.
I thank you for your taking on such a unique and rare aircraft as your scratch build project. I have enjoyed your pictures and posts from start to finish. I first came across your posts in 2014 but hadn't noticed the photos of your finished project winning Bronze in a model contest. I personally would have given it Gold but as a Sherpa pilot myself that would make me highly bias!
I have saved every picture that is able to be viewed in hopes that one day I can muster up the ambition and knowledge to try and duplicate your endeavor. Should you ever decided to take this aircraft on once again I would really like it if you painted it with the Forest Service paint scheme. I have lots of photos from all angles I'd be willing to share with you. Then I know I would try to talk you in selling it to me. If I ever attempt this project myself, be prepared to be approached with a lot of how to questions.
Cheers,
Shane