There is not a kit on the market that I know of in the US. I have about 2/3 of a kit mostly made up of small parts and newly made stuff. I find a part or two a year. I am still looking for a top cover, short lever for the top cover, and feed tray. I have been at it for around eight years now.
I know of a barrel in Ohio that is not for sale. There is a 34S in the Springfield Armory collection and the Aberdeen collection a 34S and 34/41. There are at least ten other guns and parts kits that I have heard of and none are for sale. I was shown a picture of a 34S feed tray by a Frenchman; that guy may have been a thief.