I’ve only shot one 03A3, it wasn’t many shots, and it was a long time ago, BUT they are pretty similar to an M98, and frankly, an M98 is wonderful. There are cheaper and easier builds, but if I was sitting on the OP’s action and stock, I’d rebarrel that thing ten times before I’d trade it for 700...And I’m a 700 guy.
With the OP’s distance from a gunsmith however, I’d buy a blank, send it however far it had to go to get to a good smith, and plan on taking something else to Africa. If it got finished in time, that’s a great bonus.