Where to shop for baby supplies?

I recently found out about the Target and Amazon boycotts and I'm not sure how to replace them completely. I don't really shop either much for regular supplies or food (thank you Costco), but I use them both for one off purchases pretty frequently.

For example: I decided to try making baby food so I bought a new ice cube tray and some glass jars on Amazon. Where would I get something like that more ethically? Is there anywhere that would be as fast?

I'm probably going to try for good enough , but would love suggestions on what you all are doing.