This isn't as simple as it sounds and likely an expensive project, it you can't do the work yourself.
Depending on the action size or make, a new, decent barrel $400+, change location/shape of firing pin, make up a bushing to fit the front of the block ??? $200 or replace the block assembly $200, modify the extractor $100 or purchase a new one $100.
Finding a smit willing to take on the job???
If you need stocks add another couple of hundred dollars.
Putting together one offs is labor intensive to say the least and requires decent tooling all of which is expensive.
If you can source pre made parts, that would be preferrable.
When many of these rifles were converted for target shooting clubs, the builds were sponsored by governments through shops that were willing to tool up with jigs, reamers, welding equipment, lathes, milling machines etc.
For a small shop to set up for a one off??? It would be a labor of love for the smith.
If you're looking for a cheap, nostalgic rifle, that's cheap to shoot and usually very accurate, my suggestion is to look for a rifle already made up.
I find the small Martini actions to be more accurate than most of the large receiver actions.