Hi Jean-Sebastien, the straps will be almost impossible to find. They are thin canvas straps, similar to those used on the gas mask bag. I would not restore it as it is nice as it is.
I work with a guy who already has done all the work you are talking about.
Here is an example of his armor. I also have one of his SN-42 sets, and will gladly take, and post any additional pictures you may request.
Hi Boridin, thanks for the kind offer. But all is long done now, as this is an old thread which has got brought back up.
Sorry, didn't realize that.