China

Depends if you mean under under or just under. Bankruptcy allows them
to continue on a more even playing field and the supply continues. If
they can't make it then, perhaps a new entity will arise or the parts
will be  consumed by another company, probably foreign, and the supply
continues.
I continue to feel that Ford and GM saw this coming before they spun
the guys off and hoped they could get free of them for long enough to
avoid disaster. Had they kept the work in house, GM and Ford might have
faced bankruptcy sooner than they will. The giants have enough fat left
to keep going awhile though.