Obviously that wouldn't fix current devices, though. Simulating the case on the inside might and it could be affordable. If they had a little piece of something hard that had arms that went under the case and a big arm that fastened over the top of the USB port, they could stick those on current models to reinforce them without having to use something that takes a long time to harden or could possibly break the device by oozing somewhere bad.

I'm thinking something very very loosely resembling this attachment.

If downward force is a problem, it could include a spacer that slides underneath the port to fill the gap between it and the PCB as well.