— Camp shirts are short-sleeve, button-up (or button-down, depending on dialect) tops that are unique almost exclusively in the design of the collar. The collar is designed chiefly to lay flat, rather than something like a polo collar, which usually sticks up a bit regardless of whether or not the wearer has "popped" it.
— I knew a regular button-up wouldn't work as a replacement.
[Trivial: Success] — A regular button-up works fine as a replacement. Nobody's going to notice the type of collar on your shirt. If you really are that desperate for the camp collar, you can just get a long-sleeve camp collar shirt. They make those.
— I'm not a high-enough-net-worth individual to afford them.
— And the Amazon Basics catalog is out of the question ever since you started boycotting them...
[Hard: Success] — Chinese fast fashion. Temu and Shein, places like that. Not AliExpress, though. They make shit. In fact, you're wearing a shirt dropshipped from Temu right now. You paid $34.99 on one of the discount websites to get clothes you could have bought for a third of that direct from the source.
— But what if I get...ripped off?
— Don't buy anything unless it has a good amount of reviews and a positive score. That's all. You'll be in a buyer beware market, but it's not that hard to figure it out. Start small, build your wardrobe slowly. You can get some pretty good shirts from those websites for about ten dollars a piece.
— Time to get some disco-ass clothes, baby!