After my second time bringing up ethical sourcing, I started keeping a short list of fair-trade suppliers on hand. It helps to have concrete alternatives ready, so the client doesn't feel like you're just criticizing their choice. I mean, it's still uncomfortable, but showing the actual impact, like how much better the local farm pays, can make a difference. Idk, maybe it's just me, but over time, clients who care about this stuff end up being more loyal.