"...anything with the Wby name on it commands big dollars..." Yep. Kind of like buying a part for a Cadillac vs a Chevy part. Same part, doing the same thing, but the name on the vehicle adds to the price.
Wholesalesports wants $49.99 per 20 for .375 Wby. $34.99 per 50 .375 H&H Remington brass.
And you don't need either for any bear. A .300 Win mag will do. Not that bears will bother you.