As we live through the age of shortages and all Companies needing to cut back offerings to stay profitable, we have an option available to us that was all generations before us only had.....build your own.
If you have a Ruger 77 or can buy a used one, ER Shaw offers barrels in 4140 steel, threaded and chambered for $195. They will fit the barrel for $135 (Barrel nut fits are $75) and they will blue it for an additional $55.
You may have to compromise on your dream chambering, but other barrels makers offer the same services with a wider range of chamberings/calibers at slightly higher prices.
The 375 Ruger, 416 Ruger, 458 Win, 416 Taylor, and 375/338 will all fit standard length mag actions and mag boxes with little, if any modifications.
The 9.3X62, 35 Whelen, and 338/06 are perfect conversions for the 30/06, 270 etc.
If you have any skills at all , the stock work is a snap and glass bedding can be done by anyone. Even a block of Ebony can be glued on and shaped for a forearm tip, and also an ebony pistol grip cap.
It is all within the grasp of the average tinkerer, as are cross bolts.
If you can find a good base rifle on one of the used gun sites, used gun racks, and pawn shops you can convert and modify it to your own tastes.
You will end up with a rifle you have more pride in, and enjoy more than something you could buy new, especially if new is not available.
I have been to Africa 5 times now, and have only used rifles I built myself including barrel fitting and stock work, sights, finishing, and mag modifications.
I'm not a trained gunsmith but have taught myself to do the work myself, both safely and correctly........if I can do it, ANYONE can do it!
There is nothing more satisfying than using a rifle you built yourself, and ammo you loaded yourself on a successful hunt.
It takes things to a whole different level of accomplishment, and is well worth the effort.