I switched to Aisler who are in Germany. They're certainly more expensive than China but still way less than quick turn options in the US. There will still be tariffs but they won't be nearly as high. There are also smaller PCB vendors in China other than the "big two" of JLCPCB and PCBWay that are willing to be a bit more flexible and not charge the max possible duty upfront via DDP incoterms.
I tried to order a few small parts off aliexpress from a seller I've used before. I knew I'd be paying a tariff but I was prepared to eat the cost. Turns out the seller just doesn't sell to the US anymore. Can't say I blame them.
Oshpark is still decent for small PCBs, since they are made in the US.
From what I’ve seen the biggest impact is just the carriers requiring a huge fee (relative to my $40 worth of PCBs) just to deal with the tariffs at all. I almost wonder if there’s a profitable side gig for someone couriering PCBs from Canada -> US, mailing them, and then flying back. A single suitcase can carry a LOT of PCBs. Obviously declaring it all still but just structured as a single import so the fees as a percentage would go down.