Why Spanish Perry-class frigates cannot fill the U.S. gap

Could the U.S. Navy rent or buy Spain's Oliver Hazard Perry-class frigates until new ships enter service?

No: too few suitable ships are available to make a meaningful difference, and strained relations would make a Spanish transfer especially unlikely.

The answer rejects the idea as a practical bridge rather than as a purely technical impossibility. A handful of aging foreign frigates cannot repair a force-structure shortfall at U.S. scale, and even a limited purchase or lease depends on a partner government being willing to release ships during a politically difficult period.