There's not many replacements for China and SE Asia available in the world. Especially on a quick timescale. The US and then SE Asia were the replacements for the British Empire and Europe but it took a couple centuries and the total destruction of Europe to get there. Africa is too costly in key ways to supply the First World at costs the First World is willing to pay now, that's why China was looking to them as their China, there's less of a cost disparity. (Also, they're more willing to um... supply certain goods and services.)
If the world went back to a bilateral trade focus, I'd imagine there ironically would be very quickly an agreement between the US and China, no matter where blame for the Chinese Trump Plague falls in most of the populations mind. China is too valuable of a middleman. And the US can remain the connection for Europe. We'd likely go back to that system where a "step" was required in every state goods landed in to try and obscure where most of the manufacturing was done, to say, "clean" a product of Chinese labor.
Brazil is another one, as shosta noted earlier. They're hooked into economic ecosystems where key groups in the First World would dread cutting them off while the broader populace will not know enough to care.
