The interesting thing about needing special parts to rectify this problem is........
For the motors built using old OE blocks....... they probably got 100k out of the original cam and gear...... and were probably still fine when they were pulled(so...... how bad could the alignment have been?)

And...... you never really hear of Mopars wearing out iron gears being used on flat tappet cams.

I don’t think the bronze gears are as good as they used to be(no proof, just a gut feeling)........ and for sure...... I’ve seen some roller cam cores where the ends of the teeth on the gear could use some attention.

It would make for an interesting test......
On a roller cam where the teeth were pretty squared off...... buy two of the same part number bronze gear at the same time.
Install cam and gear, run for say 2000-2500 miles.

Remove cam and gear....... dress up the teeth on the cam, reinstall cam with new gear.
Run for the same mileage as done for the first stage of the test...... pull gear and compare wear of second gear to the wear on the gear from the first stage.