"Since the cost was probably split between reduced profit and additional customer cost…"

Ha ha, that's a good one. I have yet to hear about reduced profits anywhere. Instead, as I said in another comment, I have actual physical receipts with the additional tariff cost (itemized!) in a pile on my workshop (which I'll never see refunded).

If the amounts are under the limit you might sue the company who cut those invoices in small claims court for the amounts of the tariff line items on the invoices.

The invoices give you slam dunk evidence that you paid that amount in tariffs, and the supreme court decision says the payment was illegally collected, so seems like an easy win for you.

> Instead, as I said in another comment, I have actual physical receipts with the additional tariff cost (itemized!) in a pile on my workshop (which I'll never see refunded).

You could ask for a tariff refund from those suppliers.